WordNet sense 1 (kill intentionally and with premeditation):

dispatch, hit, murder, remove, slay, polish off, bump off

WordNet sense 2 (in an unpalatable state):

sour, turned

WordNet sense 3 (having turned bad):

soured

WordNet sense 4 (not giving satisfaction):

unsatisfactory

WordNet sense 5 ((of events) no longer planned or scheduled):

cancelled

WordNet sense 6 (at a distance in space or time):

away

WordNet sense 7 (from a particular thing or place or position (`forth' is obsolete)):

forth

WordNet sense 8 (not engaged in full-time work):

inactive