ascertain
verbNAmE//ˌæsərˈteɪn//
(formal)Verb Forms present simple I / you / we / they ascertain he / she / it ascertains
past simple ascertained
-ing form ascertaining
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NAmE//ˌæsərˈteɪnəbl//
adjective See ascertain in the Oxford Advanced Learner's Dictionary
Check pronunciation: ascertain