Глагол точить / поточить (? несовершенный вид: наточить, заточить ?) имеет значение по-английски: sharpen
In other languages the word sharpen can be used in the following expressions:
1. Repetition sharpens skill.
2. We should find ways and methods to sharpen the intelligence of youngsters through a structured education system.
3. We should sharpen the knives, because they cannot even cut the butter.
The expression: "вода камень точит" means that water wears out the stone. Correct?
The meaning perhaps is that: slowly slowly something or someone achieves to lean something or someone strong.