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Etymology — The origins of English words

Where do words come from? Trace the origin and history of any English word, from its Latin, Greek or Old English roots through to its modern meaning. Every etymology is sourced.

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inhumaneness
Origin
From inhumane + -ness.
jennet
Origin
From Late Middle English genet, from Old French genet, from Old Catalan genet or Old Spanish ginete (“small fast horse; light horseman”), from Andalusian Arabic زَنَاتِي (zanātī), the Zenati or Zenata Berbers, known as excellent horse breeders. Doublet of Zenati.
kaffir
Origin
Ultimately from Arabic كَفَّار (kaffār, “infidel”) or كَافِر (kāfir, “unbeliever”), both from كَفَرَ (kafara, “to cover, to hide”); in some (especially early) uses, via Spanish cafre, Dutch kaffer or other European languages. Doublet of kafir.
insolency
Origin
Borrowed from Latin īnsolentia.
jellybrain
Origin
From jelly + brain.
kitsune
Origin
From Japanese 狐 (kitsune, “fox”).
interspace
Origin
Borrowed from Latin interspatium. By surface analysis, inter- + space.
kirkby
Origin
From kirk + -by. From Old Scandinavian / Old Norse kirkja+býr, a village with a church.
irrepentance
Origin
From ir- + repentance.
inapprehension
Origin
From in- + apprehension.
irreconcilable
Origin
Borrowed from Middle French irréconciliable, from Late Latin irreconciliābilis, from in- (“not”) + reconciliō (“to reconcile”) + -ābilis (“-able”). By surface analysis, ir- + reconcilable.
kielbasa
Origin
Borrowed from Polish kiełbasa (“sausage”), from Proto-Slavic *kъlbasa, which may derive from Proto-Turkic for "grilled cutlet," literally "pressed on ashes," from *kül (“ash”) + *bas (“to press”) (modern Turkish basmak). See the Ukrainian cognate ковбаса́ (kovbasá, “sausage”), whence kubasa, for more information.
infliction
Origin
From Latin īnflīctiōnem (“imposition”), from Latin īnflīctus, from in- + flīctus, past participle of īnflīgō (“to knock or strike against”), from in- + flīgō (“strike”) (whence in-). By surface analysis, inflict + -ion.
jakeshouse
Origin
From jakes (“outhouse; lavatory”) + house, to clarify the intended sense.
irresponsibly
Origin
From irresponsible + -ly or ir- + responsibly.
kilocalorie
Origin
From kilo- + calorie.
infuscate
Origin
The verb is first attested in 1650, the adjective in 1826; borrowed from Latin īnfuscātus, perfect passive participle of īnfuscō (see -ate (verb-forming suffix) and -ate (adjective-forming suffix)), from in- (“in”) + fuscō (“to make dark”), from fuscus (“dark”).
joachimite
Origin
From Joachim + -ite.
intransigence
Origin
From French intransigeance, noun form of intransigeant, borrowed from Spanish intransigente at the end of the nineteenth century. Morphologically, from in- + transiger + -ant, literally "uncompromising".
japanimation
Origin
Blend of Japan + animation
jaxon
Origin
Variant of Jackson
irruption
Origin
From Middle French irruption, from Latin irruptiō(n).
kine
Origin
From Ancient Greek κίνησις (kínēsis, “movement, motion”), or directly from κινέω (kinéō, “I move, put in motion”).
iteration
Origin
From Latin iterātiō, from iterō. Morphologically iterate + -ion.