Yes, it is because it describes someone's emotion.
Synonyms for the adjective rueful could include - regretful, sorrowful, mournful, or sorry.
1. It was really regretful to the little boy when school had ended.2. The teacher this morning taught us the words mysterious,gracefully, motionless,and regretful.3. Max was regretful when he had to move to another house.
No, the word 'regretful' is not a character trait, simply because it is not a formal way to describle such person, neither is it a character trait because it only symbolizes the emotion of a person at such time.
When adding a suffix to the word "regret," it can become "regretful" or "regrettable."
The adjective form of apology is "apologetic". It means containing an apology or excuse for a fault, failure, etc. For example, "An apologetic letter to his creditors explained the delay."
wistful; a nostalgic, regretful longing.
I'm most regretful about a tournament I was super close to winning. Messed up under the pressure.
It is an adjective.It is a an adjective.
A word is a thing. The word 'word' is a noun.
The word beautiful is an adjective.
The word this is a demonstrative adjective.
no it is not an adjective