verb (used with object), taught, teach·ing.
verb (used without object), taught, teach·ing.
Origin of teach
verb teaches, teaching or taught
Word Origin for teach
Old English tæcan (past tense and past participle tæhte) "to show, point out," also "to give instruction," from Proto-Germanic *taikijanan (cf. Old High German zihan, German zeihen "to accuse," Gothic ga-teihan "to announce"), from PIE *deik- "to show, point out" (see diction). Related to Old English tacen, tacn "sign, mark" (see token). Related: Taught; teaching.
Old English tæcan had more usually a sense of "show, declare, warn, persuade" (cf. German zeigen "to show," from the same root); while the Old English word for "to teach, instruct, guide" was more commonly læran, source of modern learn and lore.