Strong's #2171: euche (pronounced yoo-khay')

from 2172; properly, a wish, expressed as a petition to God, or in votive obligation:--prayer, vow.

Thayer's Greek Lexicon:

̓́

euchē

1) a prayer to God

2) a vow

Part of Speech: noun feminine

Relation: from G2172

Citing in TDNT: 2:775, 279

Usage:

This word is used 3 times:

 

Acts 18:18: "in Cenchrea: for he had a vow."
Acts 21:23: "four men which have a vow on them;"
James 5:15: "And the prayer of faith shall save the sick, and"