Tom means integrity, completeness, innocence, or blamelessness. It appears about 25 times. It describes moral wholeness — being undivided in loyalty to God, walking blamelessly.
Job walked 'in integrity' (tom). David prayed 'May integrity and uprightness protect me' (Psalm 25:21). Integrity is wholeness of character — no duplicity, no hypocrisy. It reflects the completeness and consistency of God's own character. Integrity makes one 'blameless' before God and others.