dripping water penetrates the stone (idiom); constant perseverance yie
水 · 4 strokes
Depicts the flow of water in a river.
滴 · 14 strokes
Phonosemantic compound. 啇 represents the sound and 氵 represents the meaning.
石 · 5 strokes
Pictograph of a musical stone chime. The 口 component was added later as a meaningless decorative mark.
穿 · 9 strokes
Alludes to creating a hole (穴) with one's teeth (牙). Based on the original meaning "bore a hole". The meaning later expanded to "pass through" and "wear".
学习贵在坚持，水滴石穿就是这个道理。
Persistence is key in learning — constant dripping wears away stone.