Unsuited (adjective)

1. Not appropriate or suitable for a particular purpose or situation.
2. Not matching or harmonizing well.

Origin:

Late 16th century from un- ("not") + suited.

Examples:

1. The dress was completely unsuited for the cold weather.
2. The job proved to be unsuited to his abilities.
3. The wine was unsuited to the spicy food.
4. This type of work is completely unsuited to my temperament.
5. The music was completely unsuited to the occasion.