日増しに|ひましにhimashini[0]heiban (flat)

1. adverbday by day
   日増ひましに暖あたたかくなっている。↗

   It's getting warmer day by day.

• Synonym日に日にひにひにNeutralAs in 「日に日に良くなる」; fits both speech and writing and is basically interchangeable with 「日増しに」.
• Synonym一日増しにいちにちましにNeutralMeans the same as 「日増しに」, stressing that something grows with each passing day; used less often.
• Related逐日ちくじつWrittenWritten adverb for 'day by day'; rarer than 「日増しに」 and stresses things advancing with each passing day.
• Related日ごとにひごとにNeutralNeutral adverb meaning 'day by day', as in 「日ごとに暖かくなる」; works in both speech and writing.
• Related日一日WrittenWritten phrase meaning 'with each passing day', as in 「日一日と」; rarer and more formal than 「日増しに」.
• Antonym日減りにNeutralListed as an antonym: it means something dwindles day by day, but it is not a common word, so use it with caution.

Use 「日増しに」 when something deepens day by day, as in 「日増しに寒くなる」. 「日に日に」 and 「日ごとに」 work too; in written prose you can also say 「日一日と」.

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

1. 毎日まいにち、少すこしずつ変かわっていく様子ようす。日ひに日ひに。