If you describe something such as a saying or an image as hackneyed, you think it is no longer likely to interest, amuse, or affect people. 老生常谈的; 不新奇的
adjective [原级]陈腐的;平庸的
Power corrupts and absolute power corrupts absolutely. That's the old hackneyed phrase, but it's true. 权力导致腐败,绝对权力导致绝对腐败。这虽是老生常谈,但无半点虚言。