without pity; in a merciless manner; he was mercilessly trounced by his opponent in the House
[ Syn: mercilessly , mercilessly , pitilessly , pitilessly , unmercifully , unmercifully , mercilessly , mercilessly , pitilessly , pitilessly , unmercifully , unmercifully , mercilessly , mercilessly , pitilessly , pitilessly , unmercifully , unmercifully , mercilessly , mercilessly , pitilessly , pitilessly , unmercifully , unmercifully ]