infinitive

US /ɪnˈfɪn.ə.t̬ɪv/
UK /ɪnˈfɪn.ə.t̬ɪv/
"infinitive" picture
1.

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.
Many verbs can be used as an infinitive with or without 'to'.