nacham (Hebrew #5162)
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)
KJV usage: comfort (self), ease (one's self), repent(-er,-ing, self).
Pronounce: naw-kham'
Origin: a primitive root