رَهِيفٌ

Thin; slender; (JK, TA;) applied in this sense to a sword; (TA;) and also to a neck: (ISh, TA in article بتع:) or thin in the edge or point; applied to a sword: (Ham p. 349:) or sharp, or keen; thus applied: (JK, * MA:) but Az says that it is seldom used; ↓ مُرْهَفٌ being used in its stead. (TA.)