(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) Identical in form to the archaic future perfects in -āssō, -āssere, etc., attested contemporary with Ennius, viz. amāssis, levāssō, impetrāssere, and iūdicāssit, respectively of amō, levō, impetrō, and iūdicō. Origin cited as not fully explained. Perhaps connected with a kind of prolepsis invoking a counterfactual use of aspect for emphasis.
- Forms a small number of intensive verbs from verbs.