attest – to declare or prove that something is true

(Pronounced uh-test)

To remember the definition of the word attest, use the following mnemonic:

She was put through a test (attest) to prove that she was the best. 

Examples of attest in a sentence

Numerous people could attest to him being at the party that evening. 

She could personally attest to his skills as a chef.  

Her many scientific breakthroughs could attest to her brilliance.