The Word 'willingness' is a noun; a Word for a state of being prepared to do something, readiness; a Word for a thing.
A noun functions as the subject of a sentence or a clause, and as the object of a verb or a preposition.
Example uses:
- Your willingness to take responsibility is admirable. (subject of the sentence)
- Mr. Miller whose willingness to succeed made this project possible. (subject of the relative clause)
- He had the willingness to succeed in the real estate field. (direct object of the verb 'had')
- We are thankful for his willingness to help. (object of the preposition 'for')