FROM STRONG’S HEBREW DICTIONARY (1890)

Strong’s Hebrew Dictionary (1890) — public domain, printed whole.

nacham naw-kham' — a primitive root; properly, to sigh, i.e. breathe strongly; by implication, to be sorry, i.e. (in a favorable sense) to pity, console or (reflexively) rue; or (unfavorably) to avenge (oneself):--comfort (self), ease (one's self), repent(-er,-ing, self).