om.nah is an adverbial affirmation used to reinforce a statement as genuine or factual.

The attested use is a single affirming adverbial use: it strengthens a speaker's statement, whether affirming a family relationship in Genesis 20:12 or acknowledging wrongdoing in Joshua 7:20.

1. Affirming the truth of a statement · dominant

   In Genesis 20:12, the adverb occurs in the speaker's assertion that the woman is his sister and later became his wife; the APB renders the clause "She is indeed my sister." In Joshua 7:20, it introduces Achan's acknowledgment of sin before he states what he has done; the APB renders "Truly I have sinned against the LORD God of Israel."

   Genesis 20:12Joshua 7:20

In the Anselm Project Bible: The APB presents the adverb with "indeed" in Genesis 20:12 and "Truly" in Joshua 7:20. These renderings confirm the verses' affirming force rather than establish separate senses.