依存症|いぞんしょうizonshou
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- noundependence (on alcohol, drugs, etc.)
- Synonym中毒ちゅうどくNeutralCovers poisoning, or addiction as in 「ゲーム中毒」; common in colloquial speech for saying someone is addicted.
- Synonym嗜癖しへきWrittenA medical term for addiction, used in specialist contexts; in everyday speech 「依存症」 is the normal word.
- Related耽溺たんできWrittenWritten word for sinking into indulgence, as in 「酒色に耽溺する」; describes giving in to pleasures, not a medical diagnosis.
- Related常用癖じょうようへきWrittenWritten word for addiction through habitual use; rare, and used mostly of drugs.
- Related依存癖NeutralA habit or tendency of depending on people or things; not necessarily pathological. Only 「依存症」 is the medical name.
Use 「依存症」 for medical addiction, as in 「アルコール依存症」. In casual speech, addiction is usually 「中毒」 or 「ハマる」. 「耽溺」 is written prose for indulging in pleasures; 「依存癖」 is a non-medical dependence habit; 「嗜癖」 is technical medical; 「常用癖」 is rare, mostly drugs.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


