-ò

As the third person singular first conjugation past historic ending, from earlier -ao, from Vulgar Latin *-aut, from Classical Latin -āvit.^[1] Example: Italian lodò, from Latin laudavit.

As the first person singular future indicative ending, from ho, first person singular of avere. Ho was contracted from expected *avo, from habeō, first person singular present indicative active of habēre.

-ò (non-lemma form of verb-forming suffix)

1. used with a stem to form the third-person singular past historic of regular -are verbs
2. affixed to the infinitive to form the first-person singular future indicative of regular verbs