Late 18th century; earliest use found in William Marshall (bap. 1745, d. 1818), agricultural writer and land agent. Alteration of mistetched, after misteach.
Definition of misteached in US English:
misteached
adjectiveˌmɪsˈtiːtʃt
English Regional, Northern
= mistetched.
Origin
Late 18th century; earliest use found in William Marshall (bap. 1745, d. 1818), agricultural writer and land agent. Alteration of mistetched, after misteach.