English words first recorded in the 20th century

It is formed from English check + out, chiefly after the phrasal verb check out. Dictionary.com calls it an Americanism.

It is formed from electron and the suffix -ic.

The OED takes it as borrowed from German Mutant, a noun used by H. de Vries in “Die Mutationstheorie” (1901), which was formed on the stem Latin mūtant- (“changing”), from the present participle of…

It is a shortening of revolution, of an engine or motor.

It is a compound of air, in the sense “aircraft”, and port, “harbour”. It was also written separately, air port.

It is borrowed from German Angst (“fear, anxiety”), from angest, from Old High German angust, recorded from the 8th century. Merriam-Webster takes the English word from Danish angst as well as from…

It was formed in English from catalysis on the pattern of analysis and analyst,; the OED analyses it differently: from English cata- + -lyst, after catalysis. Catalysis is catalysis, from Ancient…

It is borrowed from French garage (“a place for sheltering a vehicle”), from garer (“to shelter, to dock”), from Old French garir (“to protect”), from Frankish *warōn (“to guard”) or another…

It is formed from English geo- + political, after geopolitics. Etymonline takes it as a translation of Swedish geopolitisk, used in 1900 by the Swedish political scientist Rudolf Kjellén…

It is formed from English junk + -ie, also analysed with the suffix -y. The drug sense comes from junk in the slang sense of narcotics, especially heroin, which the OED records from 1921 and…

It is formed from English kinetic + -ase, with the first part shortened, or, as the OED and Etymonline put it, from Ancient Greek κινέω (kinéō, “to move”) and the chemical suffix. Merriam-Webster…

It is borrowed from Bulgarian лев (lev, “lion”), a variant of лъв (lăv, “lion”), the lion being an old symbol of Bulgaria. The Bulgarian word goes back to Old Church Slavonic львъ (lĭvŭ, “lion”)…

The OED takes it as borrowed from New Latin paranoides, from the psychiatric term dementia paranoides in the fifth edition (1896) of Kraepelin's textbook of psychiatry, formed from paranoia and…

It is probably from French racisme, or formed in English from race and -ism.

It is formed from English radio- + therapy, perhaps after French radiothérapie, recorded from 1898. Merriam-Webster calls it a word of the International Scientific Vocabulary. The OED compares…

It is borrowed from French bloc (“block; group”), from Old French bloc (“log, block of wood”), which also gave English block. The Old French word came from a Germanic source such as Middle Dutch…

It is from Ancient Greek κλών (klṓn, “twig, slip”), in a Latinized form, according to Etymonline; the word was first used in botany in 1903. The OED derives the Greek word from κλᾶν (klân, “to…

It is formed from English flash + back, as a noun use of the verbal phrase flash back, which Etymonline dates from 1902.

The origin is unknown. Green's Dictionary of Slang takes the "gadget" sense as a shortening of doohickey, and the "bruise, pimple, love bite" sense perhaps likewise, but Etymonline and the OED take…

It is formed from English land + fill, the second part being the noun fill, material used for filling. Dictionary.com marks it as an Americanism.

It is formed from English pediatric + -ian. Dictionary.com analyses it as the same adjective with the suffix -ician. The adjective was formed in English from Ancient Greek παῖς (paîs, “child”) and…

It is a clipping of radiotelegraphy and similar compounds, the independent use of radio-, from the combining form of Latin radius (“beam, ray”). Barnhart abstracts it from combinations such as…

It was coined in 1903 by George Bernard Shaw in the title of Man and Superman, from super- and man, as a translation of German Übermensch (“overman”), the word Nietzsche used for an ideal superior…

It is borrowed from German Antigen, from French antigène, formed from anti- and -gène. The OED instead treats the word as formed from English anti- + -gen after the German and French words…

It is formed from English pay + out, from the phrasal verb pay out, which is recorded from the mid-15th century. The OED compares the later nouns payback and payoff. The verb is from Old French…

It is from English take + away, a noun and adjective use of the phrasal verb take away. Etymonline records the verbal phrase from the early 12th century in the sense "to seize, take by force", and…

It is borrowed from French télécommunication, formed from télé- (“at a distance”) and communication. In its revision of 2016 the OED analyses it instead as formed in English from tele- and…

It is from Ancient Greek ὁρμῶν (hormôn, “setting in motion”), the present participle of ὁρμάω (hormáō, “to set in motion, urge on”), with its ending made to match the chemical suffix -one. The verb…

It is formed from English para- + normal, with the prefix in its sense "beyond, irregular, abnormal". para- is from Ancient Greek παρά (pará, “beside, near; contrary to”), and normal is from Late…

It is an agent noun from the verb process, formed with -or, in Latin form.

It is from English sex + -y.

It is a blend from English smoke + fog. Klein, cited by Etymonline, describes it as formed after Lewis Carroll's example, a portmanteau word. It is reputedly coined in reference to London fog.

It is borrowed from French bistro, also bistrot, originally Parisian slang for a small wine shop or restaurant, recorded from 1884; Dictionary.com and Wiktionary give its first French sense as the…

It is formed from English chemo- + therapy, after German Chemotherapie, recorded from 1906 or earlier, which was coined by the German biochemist Paul Ehrlich. Barnhart treats the English word as a…

It was formed in English from free and style.

It is formed from English immuno- + -logy, which Merriam-Webster places in the International Scientific Vocabulary. Etymonline calls it a hybrid of immune and -ology, and the Shorter Oxford takes…

It is a clipping of information.

It is formed from English minimal + -ist. The adjective minimal is from Latin minimus (“smallest, least”) with the suffix -al. In the first, political sense the OED takes it as modelled on a Russian…

It is borrowed from French pacifiste, which was formed with -iste on pacifisme, a word apparently coined in 1901 by the anti-war writer Émile Arnaud from pacifique, from Latin pācificus (“peaceful…

It is borrowed from German Peptid, a term coined by the chemists E. Abderhalden and P. Bergell in 1903; Etymonline dates the German word to 1902. The Oxford Dictionary of English and the Shorter…

It is formed from English psycho- + analysis, after German Psychoanalyse or French psycho-analyse, both used by Sigmund Freud in 1896. Barnhart and Dictionary.com treat the English word as a…

It is a shortening, first American, of technical (as in technical college), technician and technology.

It is probably borrowed from German Aktivist, from aktiv, active, and -ist, or formed from English active + -ist.

It is formed from air and plane, altering aeroplane under the influence of air. Merriam-Webster traces aeroplane probably to Late Greek ἀεροπλάνος (aeroplános, “wandering in air”).

The game's name is probably a use of the exclamation “bingo!”, perhaps with reference to the call in the game, though the AHD and the Oxford Dictionary of English call its origin unknown. The OED…

It is formed from English bitch + -y. Bitch is from Old English bicce (“female dog”), which Etymonline takes as probably from Old Norse. The OED compares Old Norse bikkja, Faroese bikkja and similar…

It is borrowed from Yiddish מבֿין (meyvn, “expert, connoisseur”), plural מבֿינים (mevinim), from Biblical Hebrew מֵבִין (mēḇīn, “a person with understanding, a teacher”), the participle of the…

It is formed from English ply + wood, with ply in the sense of a layer or thickness. That noun is from French pli (“a fold”), an alteration of Old French ploi (“fold, pleat, layer”), from ployer…

It is short for taxicab or taximeter cab, from taximeter (1898), from French taximètre, from German Taxameter (1890), coined from Medieval Latin taxa (“tax, charge”) (see tax) and meter.

It is a compound, from English tele- + vision, or it is borrowed from French télévision. The first part comes ultimately from Greek and means “far off”; the second goes back to Latin videō (“to see”).

It was formed from English allergy + -ic in English, after German allergisch, which the Austrian paediatrician Clemens von Pirquet used in 1906. Barnhart and Etymonline note that French allergique…

It is borrowed from German Allergie, coined in 1906 by the Austrian paediatrician Clemens von Pirquet (1874–1929) in the “Münchener medizinische Wochenschrift”. He formed it from Ancient Greek ἄλλος…

It is formed from English auto- + immune, after autoimmunity in the OED's account; Merriam-Webster instead takes it as a back-formation from autoimmunization. Auto- is from Ancient Greek αὐτός…

It is a noun use of the phrasal verb black out, from the verb black and out. Etymonline notes that black out, in the sense of covering written or printed matter with black ink, is recorded from 1888.

The sources differ on the route. The American Heritage Dictionary takes it as borrowed from Hindi चाय (cāy, “tea”) and Urdu چائے (čā'e, “tea”), probably through Persian چَای (čāy), and Collins and…

It is borrowed from French couture (“sewing, dressmaking”), from Old French cousture (“sewing, seam”), also costure (12th century), from Vulgar Latin *cōnsūtūra, formed from Latin cōnsūtus, the past…

It is formed from electronic and -ics.

It is a clipping from English pepper, which had been used in the figurative sense "spirit, energy" since at least 1847. Barnhart compares the figurative use of ginger. The word arose in American…

It is borrowed from German Schizophrenie, coined by the Swiss psychiatrist Eugen Bleuler, in 1908 according to the OED and Etymonline; Ayto and Barnhart date the coinage to 1910, and Barnhart calls…

It is borrowed from French fuselage. The OED, the Shorter Oxford, Hoad and Collins derive the French word from fuseler (“to shape like a spindle”), while Etymonline, Barnhart, the American Heritage…