his assent was bad
Genuineness of assent may be lacking in a contract if one party was coerced, misled, or mistaken about the terms or subject matter of the agreement. This lack of genuine assent can make the contract voidable.
agreement agreement
Agree.
to agree to something especially after thoughtful
Ascent is a homophone for assent.
Nodding your head often is a sign of assent in society
You have my assent to begin the procedure. Without your assent, we won't go.
she had to assent to comming to school on time
Assent as a verb: Assenting to her demands, I did as she requested. Assent as a noun: When told they were going to see The Avengers, Jayne nodded her assent.
I assent to your demands, sir.
A sailor's agreement or assent would be "aye."
Agree to. "Assent" means to agree to something, so it would be synonymous with "agree to" from the options provided.