Which word means to end something; to not use anymore?

Not following the rules means _____.

Which word means an unfavorable situation; not helpful?

Not being polite; not courteous means _____.

To let someone down; to not make someone proud means _____.

_____ means not worthy of being kept.

Which word means to bother or annoy; not leaving someone alone?

_____ means not good; depressing.

Which word means messy; not neat; not able to find things?