Infinitive

Part of speech: noun (n.)

Unlimited; not bounded or restricted; undefined. Infinitive mood (Gram.), that form of the verb which merely names the action, and performs the office of a verbal noun. Some grammarians make two forms in English: (a) The simple form, as, speak, go, hear, before which to is commonly placed, as, to speak; to go; to hear. (b) The form of the imperfect participle, called the infinitive in -ing; as, going is as easy as standing.

Part of speech: noun (n.)

An infinitive form of the verb; a verb in the infinitive mood; the infinitive mood.

Part of speech: adverb (adv.)

In the manner of an infinitive mood.