Antonyms of beneficial :
Examples of usage:
Medicine may have a bad taste, and yet have beneficial results. "One Day's Courtship The Heralds Of Fame", Robert Barr.
Although General Brock may be said to have fallen in the midst of his career, yet his previous services in Upper Canada will be lasting and highly beneficial. "The Niagara River", Archer Butler Hulbert.
Over the south creek at Hawkesbury a floating- bridge has been erected, which has proved greatly beneficial to the public; since, previous to its completion, every person who had occasion to go to that settlement, and in many cases from one farm to another, was obliged to pass to and fro in a boat. "The Present Picture of New South Wales (1811)", David Dickinson Mann.