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.
English infinitives have nominal, adjectival, and adverbial uses.
'To go' is an example of an infinitive.
Compound of 不定 (indefinite) and 詞 (word/part of speech), likely a calque from Western grammatical terminology.