to teach heresy
heterodidaskaleo denotes teaching in a way opposed to the sound words and pious teaching named in its contexts.
The two occurrences show a single use: teaching that is prohibited for certain persons and contrasted with agreement with sound words and teaching consistent with piety.
Senses in use
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Teaching contrary to approved instruction · dominant
In 1 Timothy 1:3, the present active infinitive occurs in the instruction that certain persons be ordered not to engage in this teaching; the APB renders the clause “not to teach heresy.” In 1 Timothy 6:3, the present active indicative describes anyone who teaches differently and does not agree with sound words and teaching consistent with piety; the APB renders “teaches a different doctrine.”
In the Anselm Project Bible: The APB presents the term as “teach heresy” in 1 Timothy 1:3 and “teaches a different doctrine” in 1 Timothy 6:3. These are clause-level renderings rather than definitions.