病(びょう)気(き) byoukiで de病(びょう)院(いん) byouinに ni入(にゅう)院(いん) nyuuinした shita。 I was hospitalized because of illness. Literal Illness [by-で] hospital [to-に] was-hospitalized. 病院に入院した — 入院する means 'to be hospitalized.' で marks the cause. The redundancy of 病院 + 入院 (both contain 院) is natural in Japanese. healthmedicineで (cause/reason)
病(びょう)気(き) byoukiで de病(びょう)院(いん) byouinに ni入(にゅう)院(いん) nyuuinした shita。 I was hospitalized because of illness. Literal Illness [by-で] hospital [to-に] was-hospitalized. 病院に入院した — 入院する means 'to be hospitalized.' で marks the cause. The redundancy of 病院 + 入院 (both contain 院) is natural in Japanese. healthmedicineで (cause/reason)