Grade 5 merciful Get Printable Handwriting (mer-ci-ful) 3 syllables Learn It! Spelling Test Definition adjective. 1 disposed to pity and forgive; 2 gracious Example Sentence The boss was very merciful when Bob messed up on the job. Synonyms compassionate; lenient; clement; gracious Antonyms fierce; ruthless; unpitying Share with your friends: