relentless: Meaning and Definition of

re•lent•less

Pronunciation: (ri-lent'lis), [key]
— adj.
  1. that does not relent; unyieldingly severe, strict, or harsh; unrelenting: a relentless enemy.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: