misdoer

WordReference Random House Unabridged Dictionary of American English © 2026

mis•do  (mis do̅o̅′), v., -did, -done, -do•ing. 
v.t. 

1. to do badly or wrongly;
   botch.

v.i. 

2. [Obs.] to behave improperly.

• Middle English misdon, Old English misdōn. See mis-¹, do¹ bef. 950

mis•do′er, n.