What is the verb of tidy?

The verb of "tidy" is tidy. It can be used as both a transitive and intransitive verb:

Transitive:

* Tidy the room. (Tidy something)

* Tidy your clothes. (Tidy something)

Intransitive:

* Tidy up. (Make things neat and organized)

* The room tidied up nicely. (Became neat and organized)