English

hypersomnolent

From hyper- + somnolent.

Proto-Indo-European *úp

Proto-Indo-European *upér ‘over, above’

Proto-Hellenic *hupér

Ancient Greek ὑπέρ ‘over’

Proto-Indo-European *swep- ‘to sleep’

…

Latin somnus ‘sleep’

Latin somnolentus ‘heavy with sleep, sleepy, drowsy, dozy,…’

Old French sompnolent

French somnolent

Today it means

adj Excessively sleepy

Language periods are conventional ranges, not dates for this word.

Etymograph / hypersomnolent