Strong's G2171 · Greek

εὐχή

euche · yoo-khay'

from 2172; properly, a wish, expressed as a petition to God, or in votive obligation

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 3 εὐχή , -ῆς, ἡ ( εὔχομαι ), [in LXX chiefly for נֵדֶר ;] a prayer : Ja 5:15 . a vow : Ac 18:18 21:23 .† SYN. : v.s. δέησις 

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