|Cognates:||Greek nuks (a night)|
|Latin nox (a night), genitive noctis|
|Common Celtic *nokti- (night) >
Old Irish nochd, Welsh henoeth, Cornish neihur, Breton neyzor, nos, Irish anocht (tonight), Scottish nochd (tonight)
|Common Germanic *nahtiz (night) >
Gothic nahts (night), Old Saxon neht, Old English niht, neaht, Old Norse natt, Old Frankish & Old Swedish nacht, Old High German naht
|Hittite neku- (to get dark), nekuz (evening) - absense of suffix -t- shows the original IE root|
|Vedic nak- (night), Sanskrit nakti- (night), naktam (at night)|
|Albanian naté (night)|
|Old Baltic *nakti- (night) >
Old Prussian naktin (acc. sg. night), Lithuanian naktis (night), Latvian nakts
|Common Slavic *noktï 'night' >
Belarussian noch, Bulgarian noshch, Serbo-Croatian and Slovenian noc', Chekh Slovak Polish and Sorbian noc, Polabian nu"c, Russian noch', Ukrainian nich
|Notes:||The feminine noun of i-stems, passed to consonant
stems in some branches (e.g. in Germanic).
The stem denoted everything connected with dark, getting dark, night and sunset. The suffix -t- used, obviously, for forming a noun.
French has nuit (night) as Latin kt > it, Spanish has noches, and almost all Romance languages have similar forms.
English preserved night < Middle English niht.
German keeps the old form Nacht.