Proverbs 14:5 New English Translation

⁵A truthful witness^[a] does not lie,
but a false witness^[b] breathes out lies.^[c]

Proverbs 14:5 tn Heb “a witness of faithfulness.” The genitive functions in an attributive sense: “faithful witness” (so KJV, NRSV); TEV “reliable witness.”
Proverbs 14:5 tn Heb “a witness of falsehood.” The genitive functions in an attributive sense: “false witness.”
Proverbs 14:5 sn This saying addresses the problem of legal testimony: A faithful witness does not lie, but a false witness does lie—naturally. The first colon uses the verb כָּזַב (kazav, “to lie”) and the second colon uses the noun כָּזָב (kazav, “lie; falsehood”).

New English Translation (NET)