siipi (englanniksi)

wing (s: eläintiede / ilmailu / rakennuksen osa / animal appendage for flying / airplane part / part of building / fraction of political movement / slang: human hand)
plane (s: ilmailu)
sail (s: blade of a windmill)
blade or paddle of water wheel or paddlewheel (s)
blade of turbine or propeller (s)
mood (s: idiomatic)