Indoctrinate, v. t. [imp. & p. p. Indoctrinated; p. pr. & vb. n. Indoctrinating.]
Etymology: [Pref. in- in + L. doctrina doctrine: cf. F. endoctriner.]
To instruct in the rudiments or principles of learning, or of a branch of learning; to imbue with learning; to instruct in, or imbue with, principles or doctrines; to teach; -- often followed by in. A master that . . . took much delight in indoctrinating his young, unexperienced favorite. Clarendon.
Shades of meaning
Fernald has no entry of its own for indoctrinate; he lists it under teach.
He lists it without comment; the entries above explain its neighbors.