ā-√ pyai Ā. -pyāyate (Impv. ā́-pyāyasva, [AV. vii, 81, 5]; aor. Subj. 1. pl. ā-pyāyiṣīmahi, [AV. vii, 81, 5]) to swell, increase; to grow larger or fat or comfortable; to thrive; to become full or strong; to abound, [RV.]; [AV.]; [VS.]; [AitBr.]; [MBh.]; [Yājñ.] &c.; to make full; to enlarge, strengthen, [MBh.] : Caus. ā́-pyāyayati ([AV. iv, 11, 4]; aor. Subj. ā́-pīpayan, [RV. i, 152, 6]) to cause to swell; to make full, fill up; to enlarge; to cause to grow, increase; to make fat or strong or comfortable; to confirm, [ŚBr.]; [AitBr.]; [MBh.]; [R.]; [Megh.] &c.; to help forward; to cause to increase or get the upper hand (e.g. a disease), [Suśr.] &c.