Infinitive

1. имя существительное [лингвистика] инфинитив, неопределённая форма глагола 2. прилагательное неопределённый

Большой англо-русский словарь

Infinitive

I. adjective Etymology: Middle English infinityf, from Late Latin infinitivus, from Latin infinitus formed with the infinitive • infinitively adverb II. noun a verb form normally identical in English with the first person singular that performs some functions of a noun and at the same time displays some characteristics of a verb and that is used with to (as in “I asked him to go”) except with auxiliary and various other verbs (as in “no one saw him leave”)

Энциклопедический словарь Мерриама-Вебстера