"A shameless person" is an impolite expression, usually used to describe someone who is very stubborn, persistent, or overly insistent on their opinions or demands. Although such expressions may be used in spoken language, please be aware that using such wording may hurt someone's feelings.

The following are some sentences with similar meanings, but expressed in a more polite and respectful way:

"He/she seems to be concerned about his/her I am very persistent in my ideas and do not change my mind easily. "

"He/she sticks to his or her own point of view despite the different opinions given by others. "

"He/she seems to have difficulty giving up on his/her ideas, even in the face of rebuttal and criticism. "

"He/she persists in pursuing his or her goals despite the difficulties encountered. "