v.
Pronunciation: ˌ a-s ə r- ' t ā n
Function: transitive verb
Etymology: Middle English acertainen to inform, give assurance to, from Anglo-French acerteiner, from a- (fr. Latin ad- ) + certein, certain certain
Date: 15th century
1 archaic : to make certain, exact, or precise
2 : to find out or learn with certainty
synonyms see DISCOVER
– as · cer · tain · able \ - ' t ā -n ə -b ə l \ adjective
– as · cer · tain · ment \ - ' t ā n-m ə nt \ noun