neruneru
1.

To take an unfinished material and mix or work on it repeatedly until it reaches a more uniform and usable state, often enhancing its texture or consistency in the process.

2.

To improve or refine something by making thoughtful adjustments, bringing it closer to its most optimal form, whether it be an idea, skill, or piece of writing.

3.

To practice or cultivate skills and knowledge through continuous effort and experience, leading to a more developed ability or understanding.

4.

To prepare a material, such as leather or dough, by softening or treating it to enhance its quality for a specific use.

5.

To move slowly in an organized manner, forming a line, often in a ceremonial context.

Example:

私の心と思いとを練り清めてください。