diarrhea (US) noun
or chiefly British diarrhoea /ˌdajəˈriːjə/ or chiefly British diarrhoea /ˌdajəˈriːjə/ Learner's definition of DIARRHEA
[noncount] medical
: an illness that causes you to pass waste from your body very frequently and in liquid rather than solid form腹泻