Synonyms for Chip away:

n.

weaken, erode, reduce, mute, dilute, subside, shrivel, moderate, lessen. flail, chase, cut, crimp, card, file, drill, chop, chisel. chip away (noun)
chip away at.

v.

change (verb)
chip away at.

Other synonyms:

lessen. erode, weaken. dilute, flail, chisel. moderate. chop, mute, crimp, chase. file. drill. card. cut.