ränni (englanniksi)

Often in plural (s: colloquial / 'rännit')
system for collecting the rainwater from the roof and leading it down to drain or to the ground (s: colloquial)
Any of the main components of such system (s: colloquial)
particularly a downspout or a gutter (s: colloquial / syöksytorvi / sadevesikouru)
trough which is open in one or both ends (s: colloquial)
especially when used as component in a liquid handling system (s: colloquial)
launder (s: mining / trough used by miners to separate metal-rich pieces from the crushed ore by washing)
In ice hockey (s: sports)
boards when used to steer puck (s: sports)
vein (s: slang)
especially when referred to in connection of intravenous drug use (s: slang)