Comparative evidence

h₁ep

• OInd. āp- 'obtain' (Whitney 1885: 6);  'reach', 'overtake', 'meet' (with), 'fall' (upon); 'gain', 'take possession'; 'undergo', 'suffer'; 'fall', 'come' (to); 'enter', 'pervade', 'occupy'; 'equal' (MW: 142)

References

MW = Monier-Williams, M. 1899. A Sanskrit-English Dictionary. Clarendon Press.
Whitney 1885 = Whitney W. D. 1885. The roots, verb forms and primary derivatives of the Sanskrit language. A supplement to his Sanskrit grammar. Leipzig.