Word parts change

mercy + -less

Pronunciation change

Adjective change

Positive
merciless

Comparative
more merciless

Superlative
most merciless

  1. If you are merciless, then you don't treat well people who are injured or disadvantaged; you are cruel and pitiless.
    Suzie was merciless in basketball, winning every game by 50 points.

Related words change