Undesired (adjective)

Not wanted or desired.

Origin:

From the prefix un- meaning not and the word desired.

Examples:

1. The undesired outcome of the experiment.
2. He had an undesired reaction to the medication.
3. She had an undesired effect on her hair after using the dye.
4. The undesired side effect of the treatment.
5. The undesired consequence of his actions.