несовер. - уточнять
совер. - уточнить (что-л. ) specify, make more exact/precise/accurate, define more exactly/precisely/accurately уточнить пункты договора – to determine/specify each point of the contract уточнить сведения – to get/obtain more specific information, to make the information more exact/precise/accurate – уточнить (вн.) make* (smth.) more accurate/precise
(выяснять) find* out (smth.) exactly, verify (smth.), make* (smth.) more precise