ascertain
/ˌæsəˈteɪn/verb
with obj.
- find (something) out for certain; make sure of查明; 确定：
an attempt to ascertain the cause of the accident
力求查明事故原因的努力
with clause management should ascertain whether adequate funding can be provided.管理部门应该确定能否提供足够的资金。
派生词
ascertainable
adjectiveascertainment
noun词源
late Middle English （in the sense 'assure， convince'）： from Old French acertener, based on Latin certus 'settled， sure'.