How to say "carefully" in Japanese

• よくよくCommon
  adverbCovers 'carefully' in the sense of doing something with great care or thoroughness, an emphatic strengthening of よく. Typical context: weighing a decision very carefully before acting on it.
  間違まちがいをしないようによくよく注意ちゅういしよう。↗

  Let's take the utmost caution against errors.
• つくづくCommon
  adverb (with と)Covers 'carefully' as attentively or intently — absorbed, close attention or deep reflection rather than careful handling. As a mimetic word it fits pondering something deeply, often with felt emotion or realization.

Use 「よくよく」 for 'carefully' as doing something with great care or thoroughness; use 「つくづく」 for 'carefully' as attending intently or pondering deeply, with a keen, reflective nuance.

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

• よくよくcarefully
• つらつらcarefully
• とくとcarefully
• 怠らずにおこたらずにcarefully
• 大切にたいせつにcarefully
• 心してこころしてcarefully
• とっくりthoroughly
• 注意深くちゅういぶかくattentively
• だましだましusing every trick in the book
• 面倒がらずめんどうがらずwithout getting annoyed
• じっくり(slowly and) carefully
• ためつすがめつ(scrutinizing) carefully
• つくづくintently
• ほいほいpamperingly