The ruthless dictator showed no compassion for his political opponents.
Synonyms for ruthless
merciless
cruel
harsh
Antonyms for ruthless
compassionate
kind
merciful
Practice ruthless on real SAT questions
Vocabulary like ruthless appears on the Digital SAT in Words-in-Context questions, where you choose the word that fits a passage's meaning and tone. You can also drill this word with vocabulary flashcards.