Motive in Malayalam

Malayalam words whose English meaning includes “motive”:

ആന്തരം (aantharam) — Secret motive, hidden thought.
കാരണം (kaaranam) — Cause, reason, motive, means, agency, origin.
പരായണം (paraayanam) — Main motive, devotion, hereditary custom or traditional order.
ഹേതു (hethu) — Cause, motive, tactics, pretext, middle term of a syllogism.