English
infinitival
From infinitive + -al.
A compound of infinitive + -al
Latin fīnis ‘boundary, limit’
…
Latin fīnītus ‘finished, terminated, having been finished or…’
Latin īnfīnītus ‘unlimited, infinite’
Late Latin īnfīnītīvus ‘unlimited, indefinite’
Middle English infenitife ‘without end, in perpetuity’
English infinitive
Today it means
adj Of, pertaining to, or formed from an infinitive.
Language periods are conventional ranges, not dates for this word.
Etymograph / infinitival