• 病気びょうき — illness, sickness
• 病院びょういん — hospital
• 病人びょうにん — patient
• 重病じゅうびょう — serious illness
• 急病きゅうびょう — sudden illness
• 仮病けびょう — feigned illness

The left radical 疒 (やまいだれ) means "sickness" and appears in many kanji related to disease or medical conditions. The right side 丙 (へい) provides the phonetic component. Together, they form the idea of being ill.

母ははは病気びょうきで病院びょういんに行いきました。
My mother went to the hospital because she was sick.

彼かれは重病じゅうびょうで入院にゅういんしました。
He was hospitalized with a serious illness.

🎧 Pronunciation guide for びょう and やまい is available below.