Other spellings change

Word parts change

tranquil + -ise

Pronunciation change

Verb change

Plain form
tranquilise

Third-person singular
tranquilises

Past tense
tranquilised

Past participle
tranquilised

Present participle
tranquilising

  1. (transitive) If you tranquilise an animal, you calm it or put it to sleep using a tranquiliser dart.