arkalık

From Ottoman Turkish آرقه‌لق (arkalık), analyzable as from arka (“back”) +‎ -lık.

arkalık (definite accusative arkalığı, plural arkalıklar)

1. backrest, the back piece of a chair, armchair or sofa
2. device for keeping pillows upright in a hospital bed
3. arkhalig, a long, tight-waist jacket worn in Caucasus and Iran

• Çağbayır, Yaşar (2007) “arkalık”, in Ötüken Türkçe Sözlük (in Turkish), volume 1, Istanbul: Ötüken Neşriyat, page 293