In the Rigveda Rudra's role as a frightening god is apparent in references to him as "ghora" ("terrible"), or simply as "asau devam" ("that god"). 
He is "fierce like a formidable wild beast" (RV 2.33.11). Chakravarti sums up the perception of Rudra by saying:

RV 1.114 is an appeal to Rudra for mercy, where he is referred to as "mighty Rudra, the god with braided hair."

In RV 7.46, Rudra is described as armed with a bow and fast-flying arrows. As quoted by R. G. Bhandarkar, the hymn says Rudra discharges "brilliant shafts which run about the heaven and the earth" (RV 7.46.3), which may be a reference to the destructive power of lightning.

Rudra was believed to cause disease, and when people recovered from them or were free of them, that too was attributed to the agency of Rudra. He is asked not to afflict children with disease (RV 7.46.2) and to keep villages free of illness (RV 1.114.1). He is said to have healing remedies (RV 1.43.4), as the best physician of physicians (RV 2.33.4), and as possessed of a thousand medicines (RV 7.46.3). This is described in Shiva's alternative name Vaidyanatha (Lord of Remedies).

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