言之凿凿凿凿：确实。讲得非常确实。例言之凿凿确可信据。——《聊斋志异段氏》英say sth. with certainty;[查看详情]

千金一诺一诺千金。一句诺言有千金价值。形容说话算数极守信用。例孔耘轩离座一揖道：“千金一诺，更无可移。”——清李绿园《歧路灯》英a promise that will be kept;[查看详情]

三缄其口形容说话极其谨慎、不轻易开口。英speak with caution; absolute refusal to talk with one's mouth sealed more than once;[查看详情]

守口如瓶闭口不说，像瓶口塞紧了一样。形容说话谨慎或严守秘密。例防意如城，守口如瓶。英tightlipped; reticent; do not breathe a single word;[查看详情]

一诺千金一句诺言值千金。形容说话极有信用。英promise that will be kept; be sure to keep one's promise;[查看详情]