nightgown

the word 'nightgown' is a transparent compound formed from two old english and old french roots. 'night' descends from proto-germanic nahts, itself from proto-indo-european nókʷts, a fundamental term for the period of darkness. 'gown' entered english via old french from late latin gunna, a term for a fur or leather garment. the compound logically and literally describes a garment specifically intended for wear during the night, originally referring to a loose dressing robe worn informally in the evening before the modern sense of sleepwear became dominant in the 18th century.

Structure: night (time of darkness) + gown (long, loose garment) night: from old english niht, meaning "the time of darkness between sunset and sunrise." functional role: a noun root specifying the time of use. gown: from old french goune, meaning "a long, loose outer garment." functional role: a noun root specifying the type of garment.