Unknown. Initial /dr/ does not occur in inherited Latin words that underwent regular development. Possibly onomatopoeic. If borrowed from a Celtic or Germanic language, could be from Proto-Indo-European *dʰer-, *dʰrēn- (“drone; to murmur”): initial *dʰ developed to /f/ in Latin, but to /d/ in those language groups. Compare English drone, dor and Ancient Greek θρῆνος (thrênos, “dirge, lament”).
drēnsō (present infinitive drēnsāre); first conjugation, no passive, no perfect or supine stem
No perfect is attested.
| Conjugation of drēnsō (first conjugation, no supine stem, no perfect stem, active only) | |||||||
|---|---|---|---|---|---|---|---|
| indicative | singular | plural | |||||
| first | second | third | first | second | third | ||
| active | present | drēnsō | drēnsās | drēnsat | drēnsāmus | drēnsātis | drēnsant |
| imperfect | drēnsābam | drēnsābās | drēnsābat | drēnsābāmus | drēnsābātis | drēnsābant | |
| future | drēnsābō | drēnsābis | drēnsābit | drēnsābimus | drēnsābitis | drēnsābunt | |
| subjunctive | singular | plural | |||||
| first | second | third | first | second | third | ||
| active | present | drēnsem | drēnsēs | drēnset | drēnsēmus | drēnsētis | drēnsent |
| imperfect | drēnsārem | drēnsārēs | drēnsāret | drēnsārēmus | drēnsārētis | drēnsārent | |
| imperative | singular | plural | |||||
| first | second | third | first | second | third | ||
| active | present | — | drēnsā | — | — | drēnsāte | — |
| future | — | drēnsātō | drēnsātō | — | drēnsātōte | drēnsantō | |
| non-finite forms | active | passive | |||||
| present | perfect | future | present | perfect | future | ||
| infinitives | drēnsāre | — | — | — | — | — | |
| participles | drēnsāns | — | — | — | — | — | |
| verbal nouns | gerund | supine | |||||
| genitive | dative | accusative | ablative | accusative | ablative | ||
| drēnsandī | drēnsandō | drēnsandum | drēnsandō | — | — | ||