Verb (1-dan, intransitive)
1. to chip; to be chipped; to break (off); to be damaged
2. to be missing (from a set, team, etc.); to be absent; to become lost
3. to be lacking (in); to be short (of); to be deficient; to be wanting (in)
4. to wane (of the moon); to go into eclipse
also 虧ける