Question

ascertain (v.) -> The police failed to ascertain that the man they arrested was the Gregory Brown they were really looking for. Usage tips: Ascertain is often followed by a that clause.Notice that the root of the word is the adjective certain,meaning “sure.”

Accepted Answer

to make sure of

Term	ascertain (v.)
Synonym	to make sure of
Meaning	-> The police failed to ascertain that the man they arrested was the Gregory Brown they were really looking for. Usage tips: Ascertain is often followed by a that clause.Notice that the root of the word is the adjective certain,meaning “sure.”

Ascertain V Make Police Failed Man Arrested Gregory