Perhaps from то́шный (tóšnyj) + -и́ть (-ítʹ).
тошни́ть • (tošnítʹ) impf
| imperfective aspect | ||
|---|---|---|
| infinitive | тошни́ть tošnítʹ | |
| participles | present tense | past tense |
| active | — | — |
| passive | — | — |
| adverbial | — | — |
| present tense | future tense | |
| 1st singular (я) | — | — |
| 2nd singular (ты) | — | — |
| 3rd singular (он/она́/оно́) | тошни́т tošnít |
бу́дет тошни́ть búdet tošnítʹ |
| 1st plural (мы) | — | — |
| 2nd plural (вы) | — | — |
| 3rd plural (они́) | — | — |
| imperative | singular | plural |
| — | — | |
| past tense | singular | plural (мы/вы/они́) |
| masculine (я/ты/он) | — | — |
| feminine (я/ты/она́) | — | |
| neuter (оно́) | тошни́ло tošnílo | |