n joint between the femur and tibia in a quadruped; corresponds to the human knee
v conceal or hide
v smother or suppress
v impair the respiration of or obstruct the air passage of
v be asphyxiated; die from lack of oxygen
v. （使）窒息, （使）窒闷( stifle的第三人称单数 ); 镇压, 遏制