1 to prevent, or be prevented, from breathing (easily) eg because of bad air, an obstruction over the mouth and nose etc; to suffocate: “He was stifled to death when smoke filled his bedroom”
smoren

2 to extinguish or put out (flames).
smoren

3 to suppress (a yawn, a laugh etc).
inhouden

'stifling (Bijvoeglijk naamwoord)

very hot, stuffy etc: “stifling heat”
smoorheet
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stifle

knie

Bron: Download IATE, European Union, 2017.