Choose the perfect synonym or antonym for the word

Unless

/ʌnˈles/

Used to say that something will happen or be true only if another thing happens or is true.

Synonyms:

This word has no antonyms

You won't pass unless you study hard.Unless it rains, we'll go to the park.

Middle English, from Old Norse on les, meaning on less or except, from 15th century.

89 mentions per 1 million words

Often

Hint: Frequency according to COCA