B1
the basic form of a verb that usually follows "to"
Dictionary examples:
The infinitive 'to study' makes me want to use 'to sleep' instead! (0.0)
I tried to explain infinitives to my cat. She just wanted to meow. (0.0)
I know the infinitive 'to cook', but my food always burns! (0.0)
"Go" is the infinitive form. (18.8)
In the sentences "I had to go" and "I must go," "go" is an infinitive. (28.3)