- Confidence
- Established
- Formation
- Inherited
- First attested
- c. 888
- Inherited from
- Old English þicce via Middle English
- Ultimate origin
- Proto-Germanic (*þiku-)
Pronunciation
- IPA: /θɪk/[1]
Etymology
It is inherited from Middle English thikke, inherited from Old English þicce (“dense, solid; numerous”),[2][3][4] from Proto-Germanic *thiku-,[2] the source also of Dutch dik, German dick and Old Norse þykkr.[2][3][4] Watkins reconstructs it from Proto-Indo-European *tegu- (“thick”), the source also of Old Irish tiug and Welsh tew,[2][3][5] but Hoad calls the Germanic word of unknown origin.[4]
Earliest recorded meaning
Having great extent between its opposite surfaces: about 888 in the OED, before 899 in Alfred's Boethius in Barnhart.[6][3]
Semantic evolution
Of fog and clouds it is from late Old English,[2] and of a person, stout and burly, from the mid-13th century.[2][6] Of heavy voices it is from the late 14th century.[2] The sense “stupid” is from the 1590s, and Falstaff in Henry IV, Part 2 says Poins's wit is “as thick as Tewkesbury mustard”.[2][7] From the sense “close together” came the colloquial “intimate, very friendly” (1756), hence thick as thieves (1833).[2][7] Through thick and thin is Middle English, and in the thick of is from the 1680s.[2] Lay it on thick is by 1840, and a bit thick, too much to bear, from 1884.[2][6]
Timeline
- c. 888 – thick, not thin.[6]
- mid-13th century – of a person, stout.[2]
- 1590s – stupid.[2]
- 1680s – in the thick of.[2]
- 1756 – intimate.[2]
- 1833 – thick as thieves.[2]
Modern meaning
Adjective
- Large in distance between opposite sides; not thin.
- Having a particular thickness: two inches thick.
- Growing or set close together; dense.
- Of a liquid, not flowing easily.
- Of fog or smoke, hard to see through.
- (informal) Stupid.
- (informal) Very friendly.
- Of an accent, very strong.
Noun
- The most active or intense part: in the thick of the fight.
Adverb
- Thickly, densely or heavily.
Word family
- thickish
- thickly
- thick-knee
- thick-skulled
- thick-witted
- thicket
- thickhead
- thickness
Related words
- thicken
- thickset
References
- ^ Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
- ^ a b c d e f g h i j k l m n o p Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
- ^ a b c d Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
- ^ a b c Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
- ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
- ^ a b c d Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
- ^ a b Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
Related etymologies
Cite this entry
“Thick.” Etymologically, 16 Oct. 2026, etymologically.com/en/thick. Accessed 16 Oct. 2026.
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