noun
infinitive
Grammatical term for the base form of a verb, often used with 'to' in English. In Japanese grammar, it may refer to the dictionary form or specific non-finite forms.
英語の不定詞には名詞的用法、形容詞的用法、副詞的用法がある。
English infinitives have nominal, adjectival, and adverbial uses.
「to
'To go' is an example of an infinitive.
原形 means 'base form' or 'dictionary form', which is related but not always identical to the infinitive concept in English grammar.
Compound of 不定 (indefinite) and 詞 (word/part of speech), likely a calque from Western grammatical terminology.