How to say "reliably" in Japanese

Choosing the right word
  • ちゃんとJLPT N3approx.Common
    adverb, suru verbThe common choice: 'reliably' as in doing something properly, diligently and without fail, the way it should be done. Fits contexts where a task or duty must be dependably carried out every time.
  • 陰に日にかげにひに
    adverbLiterally 'in shade and in sun': its 'reliably' sense is constancy — help or effort kept up at all times, in rain or shine. Less common, and seldom the plain everyday word for 'reliably'.

For 'reliably' meaning doing something properly and dependably, the common word is 「ちゃんと」; 「陰に日に」, less common, conveys unwavering constancy — effort or support kept up at all times, in rain or shine.

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

Japanese equivalents

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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