MIS'CHIEVOUS, adjective Harmful; hurtful; injurious; making mischief; of persons; as a mischievous man or disposition. 1. Hurtful; noxious; as a mischievous thing. 2. Inclined to do harm; as a mischievous boy.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI