病びょう患かんびょうかんMeanings1nounsickness; diseaseFormal or written term for illness or disease, often used in medical or news contexts. Less common in everyday conversation than 病気.その病びょう患かんは急きゅう速そくに広ひろがった。The disease spread rapidly.病びょう患かんの予よ防ぼうには手て洗あらいが重じゅう要ようだ。Handwashing is important for preventing illness.