老化|ろうかrouka[0]heiban (flat)

Common
Definitions
  1. suru verb, intransitive verb, no-adjectiveageing; aging; senile deterioration
    老化ろうかを防ふせぐためにもっと体からだを動うごかすべきだ。↗
    You have to get more exercise in order to stave off senility.
Conjugation
Dictionary form老化する(ろうかする)
Polite (masu)老化します(ろうかします)
Negative (nai)老化しない(ろうかしない)
polite (masen)老化しません(ろうかしません)
classical zu / nu老化せず・老化せぬ(ろうかせず・ろうかせぬ)
Past (ta)老化した(ろうかした)
polite (mashita)老化しました(ろうかしました)
Past negative (nakatta)老化しなかった(ろうかしなかった)
polite (masen deshita)老化しませんでした(ろうかしませんでした)
Te form老化して(ろうかして)
Potential老化できる(ろうかできる)
Passive老化される(ろうかされる)
Causative老化させる(ろうかさせる)
Causative passive老化させられる(ろうかさせられる)
Conditional (ba)老化すれば(ろうかすれば)
tara老化したら(ろうかしたら)
Volitional老化しよう(ろうかしよう)
polite (mashou)老化しましょう(ろうかしましょう)
Imperative老化しろ(ろうかしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • Synonym老けるふけるNeutralDescribes a person looking old, with the focus on appearance. 「老化」 can also describe the deterioration of materials and equipment; 「老ける」 cannot.
  • Synonym老いるおいるWrittenA written, literary verb for growing old, as in 「老いた親」; it is used only for people and living things.
  • Related年寄るとしよるNeutralMeans growing old and applies to people and animals (「年寄った犬」). In modern usage the noun 「年寄り」 is far more common; the verb form is rare.
  • Related加齢かれいWrittenA formal term for the mere increase in age, common in medicine and cosmetics; it does not necessarily imply declining function, which 「老化」 emphasizes.
  • Related年取るとしとるNeutralA colloquial way to say someone is getting on in years; it stresses the passing of age and is never used for the aging of objects or equipment.
  • Related老け込むふけこむNeutralSuggests someone suddenly looking old and listless, with a negative nuance; it is used only of people.
  • Antonym若返りわかがえりNeutralThe antonym of 「老化」: a return to youth, becoming young again.

Use 「老化」 for the decline of bodily functions and the aging of materials or equipment, as in 「肌の老化」「設備の老化」. For people looking old, say 「老ける」; for the mere passing of years, 「加齢」. The opposite is 「若返り」.

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

Japanese definitions
  1. 年ねんが経たつにつれ、働はたらきが衰おとろえること。
Kanji in this word
English equivalents
See also

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