Noun

• S: (n) stifle, knee (joint between the femur and tibia in a quadruped; corresponds to the human knee)

Verb

• S: (v) smother, stifle, strangle, muffle, repress (suppress in order to conceal or hide) "smother a yawn"; "muffle one's anger"; "strangle a laugh"; "repress a cry of fear"
• S: (v) stifle, dampen (suppress or constrain so as to lessen in intensity) "Stifle your curiosity"
• S: (v) suffocate, stifle, asphyxiate, choke (impair the respiration of or obstruct the air passage of) "The foul air was slowly suffocating the children"
• S: (v) suffocate, stifle, asphyxiate (be asphyxiated; die from lack of oxygen) "The child suffocated under the pillow"