Unintended (adjective)

1. Not intended, not planned, or not deliberate; accidental.
2. Not intended to be or to have a particular effect.

Origin:

Un + intended.

Examples:

1. The unintended consequences of the new policy were far-reaching.
2. The explosion was caused by an unintended reaction in the lab.
3. The unintended meaning of his statement caused some confusion.
4. He had an unintended slip of the tongue during the speech.
5. The unintended audience of the advertisement was children.