From Proto-Celtic *starnāti, from Proto-Indo-European *sterh₃- via the nasal infix formation *str̥néh₃ti.
sernaid (verbal noun sreth)
| 1st sg. | 2nd sg. | 3rd sg. | 1st pl. | 2nd pl. | 3rd pl. | Passive sg. | Passive pl. | ||
|---|---|---|---|---|---|---|---|---|---|
| Present indicative | Abs. | sernait | sernair | serntair | |||||
| Conj. | ·sernat | ·sernar | |||||||
| Rel. | sernar | ||||||||
| Imperfect indicative | ·sernad | ||||||||
| Preterite | Abs. | ||||||||
| Conj. | |||||||||
| Rel. | |||||||||
| Perfect | Deut. | ro·sreth | ro·sretha | ||||||
| Prot. | |||||||||
| Future | Abs. | ||||||||
| Conj. | |||||||||
| Rel. | |||||||||
| Conditional | |||||||||
| Present subjunctive | Abs. | ||||||||
| Conj. | ·sera | ||||||||
| Rel. | |||||||||
| Past subjunctive | ·sernte | ||||||||
| Imperative | sérnn | ||||||||
| Verbal noun | sreth | ||||||||
| Past participle | srithiu (dative singular) | ||||||||
| Verbal of necessity | srethi | ||||||||