Unplanned
Part of speech: adjective
Definition: unintentional; not intended spontaneous and not thought through in advance not having any structure or organization
Unintended
Part of speech: adjective
Definition: Not intended; unplanned
Example sentence: There is a real danger of unintended consequences, of encouraging people to give up. Pessimism, if it becomes a habit, can reinforce a narrative of unstoppable decline. If there is nothing we can do, that releases us from our obligations.