Antonyms for "goes through with" could include "backs out," "falters," or "withdraws." These terms suggest a sense of hesitancy, uncertainty, or reservation, and imply that someone has failed to see a task or commitment through to its completion. Other opposites might include "abandons," "reneges," or "quits," which connote a deliberate or conscious decision to stop pursuing a goal or objective. Alternately, phrases like "avoids," "evades," or "sidesteps" imply that someone actively avoids facing a particular challenge or responsibility, rather than confronting it head-on. Ultimately, the antonyms for "goes through with" reflect a range of different attitudes and reactions to challenges and commitments.