canal, channelize, conduit, duct, transport, carry, convey, transfer, transmit, source, more...

block, obstruct, hinder, impede, divert

television channel, radio channel, YouTube channel, streaming channel, cable channel, news channel, sports channel, more...

single, main, narrow, open, cross, deep, multi, central, two, natural, wide

make flow,   tv remote button,   medium or mashable,   part of a tv feed,   form gutters,   showtime subsidiary,   tv network,   a medium,   thin narrow groove,   river course