Perhaps a reduplicated form of Proto-Indo-European *leh₂-, with cognates including Ancient Greek λαλέω (laléō), Lithuanian laluoti, German lallen, English loll, and Welsh llolian. Could also simply be onomatopoeic.
lallō (present infinitive lallāre); first conjugation, no passive, no perfect or supine stem
No perfect is attested.
| Conjugation of lallō (first conjugation, no supine stem, no perfect stem, active only) | |||||||
|---|---|---|---|---|---|---|---|
| indicative | singular | plural | |||||
| first | second | third | first | second | third | ||
| active | present | lallō | lallās | lallat | lallāmus | lallātis | lallant |
| imperfect | lallābam | lallābās | lallābat | lallābāmus | lallābātis | lallābant | |
| future | lallābō | lallābis | lallābit | lallābimus | lallābitis | lallābunt | |
| subjunctive | singular | plural | |||||
| first | second | third | first | second | third | ||
| active | present | lallem | lallēs | lallet | lallēmus | lallētis | lallent |
| imperfect | lallārem | lallārēs | lallāret | lallārēmus | lallārētis | lallārent | |
| imperative | singular | plural | |||||
| first | second | third | first | second | third | ||
| active | present | — | lallā | — | — | lallāte | — |
| future | — | lallātō | lallātō | — | lallātōte | lallantō | |
| non-finite forms | active | passive | |||||
| present | perfect | future | present | perfect | future | ||
| infinitives | lallāre | — | — | — | — | — | |
| participles | lallāns | — | — | — | — | — | |
| verbal nouns | gerund | supine | |||||
| genitive | dative | accusative | ablative | accusative | ablative | ||
| lallandī | lallandō | lallandum | lallandō | — | — | ||