劣れっ化か

れ

っ

か

Common wordFreq.FrequencyTop 5,000

劣化する · noun or participle which takes 'suru'

Meanings

General term for decline in quality, performance, or condition. Used for materials, systems, skills, and abstract things.

aging (visible); losing attractiveness (with age)

Colloquial use, often about a person's appearance becoming less attractive due to aging. Can be blunt.

〈物もの〉が劣れっ化かするfor something (material, quality) to deteriorate
ゴムは時じ間かんが経たつと劣れっ化かする。
Rubber deteriorates over time.
〈人ひと〉が劣れっ化かするfor a person to lose their looks with age (colloquial)
彼かの女じょは最さい近きん劣れっ化かしたと言いわれている。
People say she's lost her looks lately.
劣れっ化かが進すすむfor deterioration to progress
建たて物ものの劣れっ化かが進すすんでいる。
The deterioration of the building is progressing.
劣れっ化かを防ふせぐto prevent deterioration
防ぼう腐ふ剤ざいで食しょく品ひんの劣れっ化かを防ふせぐ。
Preservatives prevent food from deteriorating.

老ろう化かN1sense 1
老化 refers to natural biological aging of living things, while 劣化 covers a broader decline in quality or performance, including materials and systems.
低てい下かN2sense 1
低下 describes a drop in an abstract level or ability, such as quality or motivation, whereas 劣化 implies an actual physical or chemical worsening.
悪あっ化かN2sense 1
悪化 is a general term for a situation or condition getting worse, such as health or relations, while 劣化 specifically describes material or performance degradation.
痛いたみN4
劣化 refers to gradual deterioration or degradation of materials, while 痛み (in its damage sense) refers to visible wear, bruising, or spoilage.

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老ろう朽きゅう化かN1
劣化 is a general term for the decline in quality of any material, while 老朽化 specifically refers to deterioration caused by aging, especially of buildings, infrastructure, or equipment.
変へん質しつ
劣化 focuses on a decline in performance or condition (e.g. materials wearing out), whereas 変質 refers more broadly to a change in essential character, not just decline.
痛いたむN2
劣化する is a more formal, technical word for materials or quality deteriorating over time, while 痛む is the everyday verb for the same idea.

向こう上じょうN2sense 1
向上 means improvement or enhancement, the direct opposite of 劣化's decline in quality or performance.

退たい化かN2sense 1
退化 refers to biological or evolutionary regression, losing a function over generations, while 劣化 is broader material or performance degradation unrelated to evolution.

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Compound of 劣 (inferior, worsen) and 化 (change, -ization). The reading れっか is a regular on'yomi combination.