διδακτικός

Didaktikós comes from Greek didáskein (to teach). The word was straightforwardly positive in Greek: didaktikós meant 'apt at teaching, instructive.' Aristotle used it. The word entered Latin as didacticus and reached English in the seventeenth century. Initially, English used it the same way Greek had: didactic meant educational, instructive, designed to teach. A didactic poem taught something. A didactic work had educational purpose.

The shift happened gradually. By the nineteenth century, didactic had acquired a secondary connotation: morally instructive in an obvious, heavy-handed way. A didactic novel preached at the reader. A didactic speech told people what to think rather than helping them think. The word began to imply that the teaching was unwelcome — that the teacher was more interested in the lesson than in the audience. The compliment became a complaint.

Modern English uses didactic almost exclusively as a criticism in literary and artistic contexts. 'That film was too didactic' means it lectured the audience. 'A didactic writer' means a writer who prioritizes message over craft. The Greek word for skill in teaching now describes the failure to teach with subtlety. The pedagogical ideal became the artistic flaw.

In education studies, the word retains its neutral meaning. Didactics — the science of teaching — is a major field in European educational research. German Didaktik, Scandinavian didaktik, and French didactique all use the word without negative connotation. The split is between everyday English (where didactic is a criticism) and academic education studies (where didactics is a discipline). The same word, two reputations.