Choose the perfect synonym or antonym for the word

Unable

/ʌnˈeɪbəl/

Lacking the capability or means to do something.

Synonyms:

I have been unable to discover any trace of a legacy.

That night, however, he was unable to sleep.

The girls just waited, unable to sleep.

The word unable originated in the late 14th century from the prefix un- meaning not and able, based on Latin habilis meaning easy to manage.

37 mentions per 1 million words

Often

Hint: Frequency according to COCA