FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

agrupneo ἀγρυπνέω — ag-roop-neh'-o — ultimately from 1 (as negative particle) and 5258; to be sleepless, i.e. keep awake:--watch.

see GREEK for 1

see GREEK for 5258