infinitive
US /ɪnˈfɪn.ə.t̬ɪv/
UK /ɪnˈfɪn.ə.t̬ɪv/

1.
不定式
the basic form of a verb, without an inflection binding it to a particular subject or tense (e.g., go, be, run).
:
•
In the sentence 'I want to go home,' 'to go' is an infinitive.
在句子「我想回家」中,「回家」是不定式。
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Many verbs can be used as an infinitive with or without 'to'.
許多動詞可以帶或不帶「to」作為不定式使用。