He obstinately refused to hear my reasons.
I can guarantee you that. Indeed you can use guarantee in a sentence.
The sentence: He refused. Extended: He refused to do it. Or: He refused to do it even though he knew how much it meant to me.
Jasmine, refused to hearken the teachers words.
He refused to consummate his arranged marriage on the grounds that he was a homosexual.
He obstinately refused to go under the dentist's drill.
The rebel refused to follow orders from the government.
Yes, that is a complete sentence because it has a subject (he) and a verb (refused), although it does need a period after 'refused'. That's all you need to form a sentence.
I Refused to open the door.
Sexually no
He was as obstinate as the donkey he was riding.
Thebeleaguer crew was outgunned, out-manned, and outranked, but they valiantly refused to surrender.