How to say "merge" in Japanese

• 合うあうJLPT N4approx.Common
  godan verb, intransitive verbCovers two or more things coming together or merging of their own accord, often into a single flow or mass; it also broadly means to meet or unite. Typical of rivers, roads, or opinions converging.
  このチョッキは前まえが合あわない。↗

  This waistcoat won't meet at the front.
• マージ
  noun, suru verbA loanword used chiefly as a technical term, especially in computing for merging files, data, or code branches. Outside such contexts it is seldom the word you want; prefer a native expression.
• 一緒になるいっしょになる
  expression, godan verbMeans to come together or join so as to become one, with a neutral, everyday nuance; the merging is often the result of people or things joining up. Suits casual descriptions of groups, paths, or companies combining.
  図書館としょかんで一緒いっしょになりましょう。↗

  I'll join you in the library.

Use 「合う」 for things naturally coming together, 「一緒になる」 for joining into one, and 「マージ」 mainly in technical or computing contexts such as merging files or data.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 合うあうto come together
• マージmerge
• 一緒になるいっしょになるto come together