Proto-Tungus-Manchu: *siK-
Meaning: 1 penthouse 2 a bar (under threshhold, into which the door heel is inserted)
Russian meaning: 1 навес, терраса 2 брус (под порогом, в котором вращается дверная пятка)
Literary Manchu: sixin 1, six́aqu 2
Comments: ТМС 2, 80-81. Attested only in Manchu, but having probable external parallels.