Inapt (adjective)

1. Not suited to the purpose or circumstances; inappropriate.
2. Not skilful or adroit; clumsy.

Origin:

Late 16th century (in the sense "unsuitable"): from latin inaptus, from in- "not" + aptus "fitted".

Examples:

1. The young man's inapt behavior at the party caused him to be asked to leave.
2. He was inapt at sports and always came in last.
3. The inapt remark made the audience uncomfortable.
4. The inapt design of the chair made it uncomfortable to sit in.
5. He found the inapt tool for the job and struggled to complete the task.