Borrowed from Old Church Slavonic освѣтити (osvětiti). By surface analysis, о- (o-) + свет (svet) + -и́ть (-ítʹ).
освети́ть • (osvetítʹ) pf (imperfective освеща́ть)
| perfective aspect | ||
|---|---|---|
| infinitive | освети́ть osvetítʹ | |
| participles | present tense | past tense |
| active | — | освети́вший osvetívšij |
| passive | — | освещённый osveščónnyj |
| adverbial | — | освети́в osvetív, освети́вши osvetívši |
| present tense | future tense | |
| 1st singular (я) | — | освещу́ osveščú |
| 2nd singular (ты) | — | освети́шь osvetíšʹ |
| 3rd singular (он/она́/оно́) | — | освети́т osvetít |
| 1st plural (мы) | — | освети́м osvetím |
| 2nd plural (вы) | — | освети́те osvetíte |
| 3rd plural (они́) | — | осветя́т osvetját |
| imperative | singular | plural |
| освети́ osvetí |
освети́те osvetíte | |
| past tense | singular | plural (мы/вы/они́) |
| masculine (я/ты/он) | освети́л osvetíl |
освети́ли osvetíli |
| feminine (я/ты/она́) | освети́ла osvetíla | |
| neuter (оно́) | освети́ло osvetílo | |