api-√ vatb (Opt. cl. 1. pl. -vatema; pr. p. -vátat) to understand, comprehend, RV. vii, 3, 10; 60, 6 : Caus. (Imper. 2. sg. -vātaya; pr.p. -vātáyat; aor. 3. pl. avīvatan, RV. x, 13, 5) to cause to understand, make intelligible to (with or without dat.), RV.; (1. pl. -vātayāmasi) to excite, awaken, RV. i, 128, 2.