noun
or en·do·re·ism ˌ ̷ ̷ ̷ ̷ˈrēˌizəm
( -s )
Etymology: International Scientific Vocabulary end- + -rheism, -reism (from Greek rhein to flow + International Scientific Vocabulary -ism ) — more at stream
: interior drainage : the condition of a region in which little or none of the surface drainage reaches the sea