無む関かん心しん

む

か

ん

し

ん

Common wordJLPTN3

Meanings

1

na-adjective, noun

Describes a lack of interest, concern, or emotional involvement toward something. Often used with に as an adverb or な as an adjective.

わか

者もの

が

選せん

挙きょ

に

無む

関かん

心しん

な

の

は

問もん

題だい

だ

。

It's a problem that many young people are apathetic about elections.

冷れい淡たん
冷淡 implies a cold, unfeeling attitude, often toward people, while 無関心 is a broader lack of interest or concern.
無む頓とん着ちゃく
無頓着 suggests a carefree or indifferent attitude, often about one's own appearance or minor matters, whereas 無関心 is more about a lack of interest in external issues.

Compound of 無 (mu, 'without') + 関心 (kanshin, 'concern, interest'). The reading is on'yomi throughout.