ارهفهُ

, (JK, S, K, &c.,) verbal noun إِرْهَافٌ; (Ham p. 93;) and ↓ رَهَفَهُ, aorist رَهَفَ , (K,) verbal noun رَهْفٌ; (TA;) He made it (a sword, S, K, &c., or a thing [of any kind], JK) thin, (S, MA, K,) or sharp or pointed; (JK, MA;) he made it (a sword) thin in the edge or point; (Ham p. 93;) he made it sharp, or keen. (MA.)

[Hence,] أَرْهَفْتَ عَلَيْنَا لِسَانَكَ (tropical:) [Thou hast sharpened against us thy tongue]. (A, TA.) And أَرْهِفْ غَرْبَ ذِهْنِكَ لِمَا أَقولُ (tropical:) [Sharpen the edge of thine intellect for what I say]. (A, TA.)