臥具 is read as がぐ (gagu) and means bedding.
がぐ
gagu
がんぐ
(person or thing treated as a) plaything
かぐ
furniture
どうぐ
きぐ
utensil
ようぐ
tool
ぶんぼうぐ
stationery
えのぐ
paint
あまぐ
rain gear
ぶぐ
Buddhist ritual implements (esp. altar fittings)
ひっきようぐ
writing implement
こどうぐ
prop master
やぐ
bedding