verb (used with object), mis·taught, mis·teach·ing.

to teach wrongly or badly.

Origin of misteach

before 1000; Middle English mistechen, Old English mistǣcan. See mis-1, teach
Related formsmis·teach·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mistaught

Historical Examples of mistaught