Opposite words for defy:
surrender, comply, concede, watch, note, capitulate, yield, apply, elude, submit, serve, shake, avoid, eschew, oblige, funk, shirk, conform, heed, dodge, accede, shun, lend oneself, agree, keep, attend, acquiesce, mind, cooperate, observe, knuckle under, evade, escape, follow, sidestep, succumb, regard, defer, give in, stoop, goose-step, listen, hear, assent, duck, bow, obey, mark, notice.
Usage samples:
  1. " If thou mayest be of the Round Table," answered Turquine, " I defy thee, and all thy fellows."
    "The Legends Of King Arthur And His Knights", James Knowles.
  2. In the former case deliverance will come through a catastrophe whose consequences defy all calculation.
    "Letters From Rome on the Council", Johann Joseph Ignaz von Döllinger.
  3. In some instances they defy classification according to branch of service.
    "Complete State of the Union Addresses from 1790 to the Present", Various.
  4. Your father is just the sort to outrage all family sentiment, and defy public opinion.
    "The Scarlet Feather", Houghton Townley.