verb

swear

to swear, to vow, to curse

I swear to tell the truth.

I swear to tell the truth.

He started swearing at the other driver.

He started swearing at the other driver.

I swear I didn't do it.

I swear I didn't do it.

((to-inf)) to promise solemnly I swear to tell the truth.

((at sb.)) to use offensive language towards (sb.) He started swearing at the other driver.

((that + clause)) to state something emphatically I swear that I didn't do it.

Synonyms: vow, promise, curse, cuss; Antonyms: deny, repudiate

From Old English 'swerian', 'to take an oath'.

You can 'swear an oath' (promise) or 'swear at someone' (curse). Both are strong uses of words.

This page is designed for learning support. Please use it as a learning reference, not as a formal reference.