ものになる

expression, godan verb (-ru)

prove successful; take hold; amount to something

Used when a person, effort, or project finally achieves a worthwhile result or becomes established. Often implies that initial attempts were uncertain.

• 長なが年ねんの研けん究きゅうがようやくものになった。

  His years of research finally proved successful.

• このアイデアがものになるかどうかはまだわからない。

  We still don't know whether this idea will amount to anything.