How to say "peacefully" in Japanese

• のびのびCommon
  adverb (with と), suru verbCovers 'peacefully' in the sense of being free of stress or constraint, with one's mind at ease. It typically describes children or people growing, behaving, or living freely and comfortably in an unrestrictive environment.
  子こどもはのびのび育そだつべきだ。↗

  Children should grow up carefree.
• 仲良くなかよくCommon
  adverbCovers 'peacefully' when the point is harmony between people: living, playing, or getting along together on friendly terms. It is really about amicable relationships rather than an individual's state of mind, so it fits group contexts best.
  私わたしたちはたちまち仲良なかよくなった。↗

  We immediately became friends.
• のんびりJLPT N3approx.Common
  adverb (with と)Covers 'peacefully' as a relaxed, carefree, unhurried manner: spending a quiet day at leisure. As a mimetic word it conveys an easygoing pace or mood, and is often the natural choice for 'peacefully' describing one's own lifestyle.
  退職たいしょくしたのでしばらくのんびり暮くらすつもりです。↗

  I've retired and I'm going to take it easy for a while.

Use 「のびのび」 for acting freely and without stress, 「仲良く」 for living or getting along in harmony with others, and 「のんびり」 for a relaxed, unhurried, carefree manner.

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

• のびのびcomfortably
• 仲良くなかよくon good terms (with)
• のんびりat leisure
• おちおちquietly
• 何事もなくなにごともなくuneventfully
• 静かにしずかにcalmly
• すやすや(sleeping) peacefully
• 無事にぶじにin peace