رَهِيفٌ
Root: رهف
Full Definition
رَهِيفٌ
Thin; slender; applied in this sense to a sword; and also to a neck: (ISh, TA in art. بتع:) or thin in the edge or point; applied to a sword: or sharp, or keen; thus applied: but Az says that it is seldom used;
مُرْهَفٌ being used in its stead.