noun
or föhn ˈfərn, ˈfen, Ger fœ̅œ̅n
( -s )
Etymology: German föhn, from Old High German phōnno, from (assumed) Vulgar Latin faonius, from Latin favonius warm west wind; akin to Latin fovēre to warm — more at day
: a warm dry wind blowing down the side of a mountain — compare chinook 3b