somnolence

Borrowed from Middle French somnolence, from Late Latin somnolentia, derived from Latin somnus (“sleep”), from Proto-Indo-European *swépnos (“sleep, slumber”).

somnolence (usually uncountable, plural somnolences)

1. A state of drowsiness or sleepiness.

• hypersomnia

Borrowed from Late Latin somnolentia, derived from Latin somnus (“sleep”), from Proto-Indo-European *swépnos (“sleep, slumber”).

somnolence f (plural somnolences)

1. sleepiness
   • 1912, Pierre Loti, Un pèlerin d'Angkor

     Et puis, surtout, midi approche, avec sa lassitude, avec son invincible somnolence.

• somnolent

• “somnolence” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).