Strong's G5258 · Greek

ὕπνος

hupnos · hoop'-nos

from an obsolete primary (perhaps akin to 5259 through the idea of subsilience); sleep, i.e. (figuratively) spiritual torpor

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 6 ὕπνος , -ου, ὁ [in LXX for שֵׁנָה , חֲלוֹם , etc. ;] sleep : Mt 1:24 , Lk 9:32 , Jo 11:13 , Ac 20:9 ; metaph., Ro 13:11 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain