Contemptible :-  deserving to be treated with contempt..

• She has played a contemptible trick on her friend.
• He’s a contemptible politician known to take bribes even from poor people.
• The jury sentenced capital punishment to the contemptible rapist.
• He’s a contemptible man who won’t appreciate the virtues and exceptional capabilities of others, maybe he is devoid of any of these qualities to his credit.

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Contemptuous :- showing contempt.

• He gave a contemptuous laugh.
• She talked in a contemptuous tone about the poor local farmers.
• The snobbish man looked at the poor servant with a contemptuous smile.
• He’s very contemptuous of Carnatic Musicians whom he describes as having no sense of modernity.
• She’s contemptuous of my humble background.