I. ˈvōlə(r) adjective
Etymology: Latin vola palm of the hand, sole of the foot + English -ar
: relating to the palm of the hand or sole of the foot ; specifically : located on the same side as the palm of the hand
the volar surface of the forearm — R.S.Woodworth
II. adjective
Etymology: Latin vol are to fly + English -ar
: relating to or used in flight