(idiomatic) To speak to or persuade a nearly nonexistent audience, or to an audience not listening

(idiomatic) To attempt to persuade a party that does not wish to listen or cannot be altered in its conviction.

Third-person singular simple present indicative form of preach to deaf ears

simple past tense and past participle of preach to deaf ears

(American spelling) To act in harmony with one's teachings and advice.

(British spelling) Alternative form of practice what one preaches

Third-person singular simple present indicative form of practice what one preaches

simple past tense and past participle of practice what one preaches

present participle of practice what one preaches

To act hypocritically; to fail to practice what one preaches.