Dictionary entry

ἀγρυπνία

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

** ἀγρυπνία, -ας, ἡ (v. supr.),

[in LXX: Si₉, II Mac 2:26*;]

sleeplessness, watching: II Co 6:5 11:27. (Plat., Hdt.; for exx. in π., v. MM, VGT, s.v.).†