по- (po-) + у́мничать (úmničatʹ) IPA(key): [pɐˈumnʲɪt͡ɕɪtʲ] <span class="searchmatch">поу́мничать</span> • (poúmničatʹ) pf (imperfective у́мничать) (colloquial, disapproving) to act...
(-atʹ) IPA(key): [ˈumnʲɪt͡ɕɪtʲ] у́мничать • (úmničatʹ) impf (perfective <span class="searchmatch">поу́мничать</span>) (colloquial, disapproving) to act smart, to be a smartarse/smartass...