Strong's #529: 'emuwn (pronounced ay-moon')
from 539; established, i.e. (figuratively) trusty; also (abstractly) trustworthiness:--faith(-ful), truth.
Brown-Driver-Briggs Hebrew Lexicon:
ּ
'êmûn
1) faithfulness, trusting
1a) faithful, trusty (as adjective)
Part of Speech: noun masculine
Relation: from H539
Usage:
This word is used 5 times:
Deuteronomy 32:20: "generation, children in whom is no faith."
Proverbs 13:17: "messenger falleth into mischief: but a faithful ambassador is health."
Proverbs 14:5: " A faithful witness will not lie: but a false witness will utter lies."
Proverbs 20:6: "will proclaim every one his own goodness: but a faithful man who can find?"
Isaiah 26:2: "that the righteous nation which keepeth the truth may enter in."