劣れっ化か

れ

っ

か

Common wordFreq.FrequencyTop 5,000

Meanings

noun, noun or participle which takes 'suru', intransitive verb

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

長ちょう期き間かん使つかわないと、バッテリーが劣れっ化かする。
If you don't use it for a long time, the battery deteriorates.

この素そ材ざいは紫し外がい線せんで劣れっ化かしやすい。

This material is prone to degradation from ultraviolet rays.

noun, noun or participle which takes 'suru', intransitive verb

aging (visible); losing attractiveness (with age)

colloquial

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

老ろう化か
老化 is biological aging (cells, body, population), while 劣化 is a broader decline in quality or performance. For people, 劣化 is more about visible unattractiveness.
低てい下か
低下 means a drop in level or ability (e.g., 品質低下), often used with abstract measures. 劣化 implies a physical or chemical worsening.

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