First opened Wednesday, January 7, 2009
入院
にゅういんする
Pitch accent: We don't have the data for this section. No accent list gives this spelling and reading, or the two we check against disagree.
hospitalization
入院 is probably from a Middle Chinese compound, literally “enter + institution”.
Taken apart
No breakdown is shown for this word: the only split Wiktionary offers is hedged (see the marked line below), and it doesn't spell the word — it describes where the sound may come from — so showing it as the word's parts would be a guess.
In a sentence
彼は入院している。
He is in hospital.
彼は昨日入院した。
The hospital took him in yesterday.
Sentences are from Tatoeba (CC BY 2.0 FR), picked by fixed rules from a dated export and shown unchanged. Nobody has reviewed them one by one.
What Wiktionary says
Quoted line by line from Wiktionary's Etymology section for this reading, taken from one dated dump so it can't change underneath us. Nothing below is paraphrased.
Not settled
Wiktionary itself hedges on part of this word's origin — those lines are marked below.
- “/nipuwin/ → /nifuwin/ → /niuwin/ → /njuːin/”
- Hedged“Probably from Middle Chinese compound 入院 (nyip hjwenᴴ, literally “enter + institution”). Compare modern Mandarin reading rùyuàn, Cantonese jap⁶ jyun⁶.”
Source: Wiktionary: 入院 (dump of 2026-09-02), available under CC BY-SA 4.0. Reading, meaning and part of speech from JMdict, and kanji readings from KANJIDIC2 (EDRDG).
What the labels mean
- 漢語 Sino-Japanese
- Words built from Chinese-derived morphemes — borrowed from Chinese or coined in Japan out of Chinese parts — read with on'yomi.
- Compound
- Two or more words or stems joined into one.
- Borrowing
- Taken over from another language.
- Sound change
- The pronunciation shifted over the centuries.