a. 被教错的

Mistaught \Mis*taught"\ (m[i^]s*t[add]t"), a. [See {Misteach}.]
Wrongly taught; as, a mistaught youth. --L'Estrange.


Misteach \Mis*teach"\, v. t. [imp. & p. p. {Mistaught}; p. pr. &
vb. n. {Misteaching}.] [AS. mist[=ae]can.]
To teach wrongly; to instruct erroneously.