Latin words first recorded in the 1st century BC

It is from Latin sacer (“sacred”) + -ārium (“place for”).

It is from Latin sacrō (“to consecrate”), its participle, used as an adjective. The verb is from Latin sacer (“sacred”), which de Vaan traces to Proto-Italic *sakro- (“sacred”) and…

It is from Latin sacrificō (“to sacrifice”) + -ium, ultimately from sacrum “rite” and faciō “to do”. Isidore explains it as a ⟨sacrum factum⟩, a thing made holy.

It is a compound from Latin sacrō + sānctus (“consecrated”), ⟨sacrō⟩ being probably the ablative of sacer (“sacred”) or of sacrum (“religious rite”), the participle of sanciō (“to make sacred”)…

It is from Latin saepe (“often”) + numerus (“number”), with the ablative ⟨numerō⟩, “in number”. De Vaan explains the adverb as an old neuter *saepi, “closely packed”, related to saepēs (“hedge”)…

Its origin is uncertain. De Vaan finds it tempting to derive a *saipi- “packed, fenced” from the root *seh₂i- “to bind”, but a suffix *-p- is not known, and Umbrian seples (“nails”) may be related…

Used as a noun, it is the neuter participle from Latin saepiō (“to fence in, enclose”). That verb comes from saepēs (“hedge, fence”), which de Vaan traces to Proto-Italic *saip-i-; a link with…

It is from Latin sagāx (“keen-scented, perceptive”) + -tās. De Vaan traces sagāx to Proto-Italic *sag-āk- (“perceptive”), beside sāgiō (“to perceive”), praesāgiō (“to foresee”) and sāgus…

It is perhaps inherited from Proto-Italic *sāgiō (“to seek, perceive”), from Proto-Indo-European *seh₂g- (“to track, seek out”). The simple verb is recorded later than its compound praesāgiō (“to…

It is formed from Latin sāl (“salt”) + -īna. Lewis and Short take it as an adjective with fodīnae “pits” understood.

It is from Latin saltō (“to dance”) + -tor. The verb saltō is the frequentative of saliō (“to jump, leap”), which de Vaan traces to Proto-Italic *sal-je- (“to jump”); he regards the form of the root…

It is from Latin salūtō (“to greet”) + -tiō. The verb is made from salūs (“health, safety; greeting”).

It is from Latin sānō (“to heal, cure”) + -bilis. The verb comes from sānus (“healthy”), which de Vaan traces to Proto-Italic *sāno-; he calls the further reconstruction Proto-Indo-European…

It is from Latin sānctus (“holy”) + -mōnia, like ⟨ācrimōnia⟩ and ⟨parsimōnia⟩.

It is formed from Latin sanciō + -tiō. De Vaan traces sanciō (“to make sacred, ratify”) back to Proto-Italic *sa-n-k-je- (“to sanctify, solemnly dedicate”) and Proto-Indo-European *sh₂-n-k- (“to…

It is from Latin sānctus (“sacred, holy”) + -tās. The adjective is the participle of sanciō (“to make sacred, ratify”), which Wiktionary traces to Proto-Indo-European *seh₂k- through a nasal present.

It is from Latin sanguis (“blood”) + -eus.

It is from Latin sarcina (“pack, bundle”) + -ula, a diminutive. De Vaan lists the noun sarcina among the derivatives of sarciō (“to mend”), which goes back to Proto-Italic *sark-je/o- and…

It is from Latin satisfaciō (“to satisfy, make amends”) + -tiō; ⟨satisfaciō⟩ is from satis “enough” and faciō “to do”.

It is from Latin scalprum (“tool for scraping or cutting”) + -lum, a diminutive. The base noun is in turn formed on scalpō (“to scratch, carve”).

It is borrowed from Ancient Greek σκῆπτρον (skêptron, “staff, sceptre”). The Greek noun comes from σκήπτω (skḗptō, “to prop, lean on”) with the instrument suffix ⟨-τρον⟩.

It is borrowed from Ancient Greek σχίδη (skhídē), which Lewis & Short also give as σχέδη (skhédē), Wiktionary's form, glossed “papyrus leaf”. The OLD compares Hesychius' σχίδα (skhída), which Beekes…

It is from Latin sciēns (“knowing”) + -ter, the present participle of sciō (“to know”) with the adverb suffix. De Vaan takes the verb to be probably a back-formation from nesciō (“not to know”); it…

It is from Latin scīscō (“to decree, vote for”), the neuter of its participle, ⟨scīscō⟩ being the inchoative of sciō “to know”, used as a noun. De Vaan derives ⟨sciō⟩ perhaps from a root “to cut…

The origin is unknown: de Vaan offers no etymology, and the OLD calls it doubtful. Wiktionary mentions a possible extension of Proto-Indo-European *(s)ker- (“to cut”) as *(s)krewp-, or an…

It is from Latin scalpō (“to scratch, carve”), a back-formation from its compounds such as exsculpō (“to carve out”), in which the root vowel appears as ⟨u⟩. De Vaan records the compound from…

It is from Latin scutra (“tray, platter”) + -ella. The ancient grammarians, as Georges reports, derived it from scūtum “shield”.

It is from Latin sēcēdō (“to withdraw”) + -tiō. sēcēdō is a compound of sē- (“apart”) and cēdō (“to go”), which de Vaan traces to Proto-Italic *kesd-e/o- (“to go away, avoid”).

It is formed from Latin sēcernō (“to separate”) + -tiō.

It is from Latin sē- (“apart”) + cubō (“to lie down”). De Vaan explains the prefix as the old ablative ⟨sēd⟩, which as a preposition meant “without, away”. The verb cubō goes back to Proto-Italic…

It is from Latin secundus (“second, following”) + -ārius.

It is from Latin securus (“free from care”) + -tās.

It is from Latin se- (“without”) + cura (“care”), with the ending -us.

It is from Latin sēditiōsus (“seditious, factious”) + -ē. The adjective, found from Varro on, is formed from sēditiō (“violent discord, rebellion”), which de Vaan lists among the derivatives of eō…

It is formed from Latin sēdūcō + -tiō.

The OLD derives it from the adverb sēdulō (“sincerely, diligently”), which it and de Vaan explain as from Latin sē- (“without”) + dolus (“guile”), an old ablative phrase *sē dolōd “without malice”…

It is from Latin sēligō (“to pick out”) + -tiō, from sē- and legō “to gather, choose”.

It is from Latin sēmi- (“half”) + ferus (“wild”). The prefix goes back to Proto-Italic *sēmi- and to Proto-Indo-European *sēm-i (“in one”), a locative whose meaning shifted from “in one” to “one of…

It is from Latin sēmi- (“half”) + hōra (“hour”).

It is from Latin sēmen (“seed”) + -ārium (“place for”), the neuter of the adjective sēminārius (“of seed”). De Vaan traces sēmen to Proto-Italic *sēmn and Proto-Indo-European *seh₁-mn (“seed”), from…

It is from Latin sēmi- (“half”) + vīvus (“alive”).

The origin of the name is unclear.

It is from Latin sēmi- (“half”) + ūstus (“burnt”), the second part being the past participle of ūrō (“to burn”); Wiktionary explains the contraction of /i/ and /u/ by comparison with sēmustulō. De…

It is from Latin senātus (“senate”) + -tor, from senex “old, old man”, from Proto-Indo-European *sen- (“old”).

It is formed from Latin senātor (“senator”) + -ius. ⟨Senātor⟩ belongs to senātus (“senate”) and ultimately to senex (“old man”), which de Vaan traces to Proto-Italic *seno- (“old”) and…

It is from Latin senex (“old”), its comparative, whose base is Proto-Italic *seno- (“old”), from Proto-Indo-European *sen-(o-) (“old”). Compare Old Irish sen (“old”) and Sanskrit सन (sána, “old”).

It is probably inherited from Proto-Italic *sem-t-, from Proto-Indo-European *semH- (“to scoop”). De Vaan sees no formal or semantic obstacle to the connection, but notes that without other Latin…

It is from Latin sēparō (“to separate”) + -tiō.

It is from Latin sē- (“apart”) + pōnō (“to put”). The verb pōnō comes from ⟨*po-sinō⟩ “to put down”, from sinō (“to let”).

It is from Latin septem (“seven”) + decem (“ten”).

It is from Latin septem (“seven”) + -iēs. De Vaan traces septem to Proto-Italic *septm̥ and Proto-Indo-European *septḿ̥ (“seven”). Cognate with Sanskrit सप्त (saptá), Ancient Greek ἑπτά (heptá) and…

It is from Latin serēnus (“clear, fair”) + -tās. De Vaan derives ⟨serēnus⟩ from Proto-Italic *(k)seró- (“dry”) and Proto-Indo-European *Kseh₁-ró- (“dry”), both built on an unattested present meaning…

It is from Latin sero (“to join, link, bind”) + -iēs. Döderlein compared Greek Ancient Greek εἴρω (eírō, “to string together”).

It is from Latin sedeo (“to sit”) + -tiō. Varro noted that a seat should have been sediculum from sitting, as cubiculum comes from lying.

It is from Latin sēstertius (“sesterce”), its genitive plural in phrases such as ⟨deciēs centēna mīlia sēstertium⟩, “ten times a hundred thousand of sesterces”, taken as a neuter singular noun once…

It is the adverb from Latin sevērus (“stern, serious”) + -ē. De Vaan favours Nussbaum's derivation of ⟨sevērus⟩ from Proto-Italic *seχwēro- (“steadfast”) and Proto-Indo-European *seǵʰ-ur-…

It is formed from Latin sīca (“dagger”) + -ārius. De Vaan finds no way to connect ⟨sīca⟩ with the root of secō (“to cut”) and no other etymology, and thinks it may be a loanword.

It is from Latin significō (“to show by signs”) + -tiō. The verb is from sīgnum (“sign”) and faciō (“to make”); de Vaan traces sīgnum to Proto-Italic *sekno- (“statue, sign”), from…

It is from Latin simplex (“simple, single”) + -ter. simplex is formed from the root of semel (“once”) and -plex (“-fold”).

It is borrowed from Ancient Greek Σειρήν (Seirḗn). The origin of the Greek word is unclear. Beekes notes that it can formally be compared with σειρά (seirá, “rope, cord”), as “the ensnaring one”, or…