Added 9 October 2026 lessened adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. More about lessened at Wordnik → Where our words come from → Impaired by diminution. Decreased in severity; made less harsh. Related Words: diminishedmitigatedweakenedimpairedvitiateddecreasereducedattenuatedshrunkrelaxedreductionmitigate Back to today's word