εὐχήeuchḗ, yoo-khay'; from G2172; properly, a wish, expressed as a petition to God, or in
votive obligation:—prayer, vow.
Thayer's Greek Lexicon
[?](Jump to Scripture Index)
STRONGS G2171:
εὐχή, -ῆς, ἡ, (εὔχομαι), [from Homer down]; 1.a prayer to God: James 5:15. 2.a vow (often so in the Sept. for נֵדֶר and נֶדֶר, also for נֵזֶר consecration, see ἁγνίζω): εὐχὴνἔχειν, to have taken a vow, Acts 18:18; with ἐφ’ἑαυτῶν added (see ἐπί, A. I. 1 f., p. 232a), Acts 21:23.