narunaru
1.

To transform into a different state or form as a result of development or progression, often reflecting a significant change or maturation process.

2.

To reach a certain condition or level, indicating the completion of a process or the realization of a goal.

3.

To be made up of various components or elements that together form a whole, emphasizing the idea of composition or structure.

4.

To allow or permit something to occur, often expressing a sense of capability or possibility regarding actions or states.

5.

To represent or embody a specific role or status, particularly in the context of personal identity or social position.

Example:

あなたがいなくなるととても寂しくなります。

あいな相成ainaru
1.

A formal expression used to indicate a change of state or existence, often found in polite or respectful contexts.

2.

A refined way to say "to become," used in situations that require elevated language, often signaling gratitude or formality in correspondence.