H7491. raaph
[רָעַף] verb trickle, drip, synonym of נזל, II. ערף (compare Arabic flow (of blood), bleed (of the nose)); —
Qal Imperfect3masculine plural יִרְעֲפוּ, of clouds [Job 36:28] (with עֲלֵי person; || יִזְּלוּ), with accusative of material טַל [Prov 3:20]; figurative דָּ֑שֶׁן יִרְעֲפוּן מַעְגָּלֶיךָ [Psa 65:12] (i.e. fertilizing rain); subject of moistened ground, מִדְבָּר נְאוֺת, [65:13].
Hiph`il Imperative masculine plural הַרְעִיפוּ [Isa 45:8] trickle, O heavens, from above (figurative: || צֶרֶק יִּוְּלוּ).