嚥えん下げ障しょう害がい

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Meanings

dysphagia; difficulty swallowing

Medical term for the symptom of impaired swallowing. Used in clinical contexts; in everyday conversation, people may say 飲み込みにくい or 飲み込みづらい.

嚥えん下げ
嚥下 means 'swallowing' (the act), while 嚥下障害 specifically refers to the disorder or difficulty in swallowing.
誤ご嚥えん
誤嚥 is 'aspiration' (food or liquid entering the airway), a possible complication of dysphagia.

嚥えん下げ障しょう害がい
Standard medical term; the kanji 嚥 is not a jōyō kanji, so kana may be used in general contexts.
えんげ障しょう害がい
Mixed kana-kanji spelling sometimes used when 嚥 is difficult to read or write.
嚥えん下げしょうがい
Partial kana spelling; less common but seen in patient-facing materials.

Compound of 嚥下 (swallowing) and 障害 (disorder). 嚥下 is from Chinese 嚥下 (yànxià), using the character 嚥 (swallow) and 下 (down).