תהילים קב:ד פירוש: רש״י

are dried up Heb. נחרו. The “nun” serves as a prefix, as: נַעֲשׂוּ, they were made, נִקְנוּ, they were acquired; and it is an expression of dryness, as (Job 30:30): “and my bones dried out (חרה) from the heat”; (Jer. 6:29), “the bellows is heated (נחר).”