Inherited from Old East Slavic вꙑкнѫти (vyknǫti), from Proto-Slavic *vyknǫti. Cognate with Old Church Slavonic вꙑкнѫти (vyknǫti), Serbo-Croatian ви̏кнути, Ukrainian приви́кнути (pryvýknuty), Polish nawyknąć, Czech navykat, Upper Sorbian wuknyć (“to learn”). Related to Russian обы́чай (obýčaj, “custom”), учи́ть (učítʹ, “to teach”), нау́ка (naúka, “science”). More distantly related to Lithuanian jùnkti (“to get used to”) (1sg. jùnkstu), Latvian jûkt, Lithuanian jaukìnti (“to teach”), Old Prussian iaukint (“to exercise”), Lithuanian jaukùs (“meek, sweet”), Sanskrit उच्यति (úcyati, “to have a habit”), ओकस् (ókas, “pleasure”), Old Armenian ուսանիմ (usanim, “to get used to, to learn”), Gothic 𐌱𐌹𐌿𐌷𐍄𐍃 (biūhts, “familiar”), Old Irish do·uic (“to understand, to know”).
-вы́кнуть • (-výknutʹ) pf (imperfective -выка́ть)
| perfective aspect | ||
|---|---|---|
| infinitive | -вы́кнуть -výknutʹ | |
| participles | present tense | past tense |
| active | — | -вы́кший -výkšij |
| passive | — | — |
| adverbial | — | -вы́кши -výkši |
| present tense | future tense | |
| 1st singular (я) | — | -вы́кну -výknu |
| 2nd singular (ты) | — | -вы́кнешь -výknešʹ |
| 3rd singular (он/она́/оно́) | — | -вы́кнет -výknet |
| 1st plural (мы) | — | -вы́кнем -výknem |
| 2nd plural (вы) | — | -вы́кнете -výknete |
| 3rd plural (они́) | — | -вы́кнут -výknut |
| imperative | singular | plural |
| -вы́кни -výkni |
-вы́кните -výknite | |
| past tense | singular | plural (мы/вы/они́) |
| masculine (я/ты/он) | -вы́к -výk |
-вы́кли -výkli |
| feminine (я/ты/она́) | -вы́кла -výkla | |
| neuter (оно́) | -вы́кло -výklo | |