◎ 水滴石穿 shuǐdī-shíchuān

[dripping water can wear through a stone] 滴水可使石穿。比喻坚持不懈,集细微之力也能成就难能之功

张乖崖为 崇阳令,一吏自库中出,巾下有一钱。 乖崖杖之。吏曰:“一钱何足道?乃杖我也!” 乖崖援笔判曰:“一日一钱,千日千钱,绳锯木断,水滴石穿。”

滴水久了可使石穿。比喻持之以恒，事必有成。宋．罗大经《鹤林玉露．卷一○》：「一日一钱，千日一千，绳锯木断，水滴石穿。」也作「滴水穿石」。近磨铁成针

英语 dripping water penetrates the stone (idiom)​; constant perseverance yields success, You can achieve your aim if you try hard without giving up., Persistent effort overcomes any difficulty.

法语 (expr. idiom.)​ les gouttes d'eau finissent par pénétrer la pierre, la persévérance constante apporte le succès, l'effort persistant surmonte toute difficulté