Comparative evidence

1.h₁es

• OInd. as- 'be' (Whitney 1885: 5); 'live', 'exist', 'be present'; 'take place', 'happen'; 'abide', 'dwell', 'stay'; 'belong'; 'be equal' (to); 'turn out', 'prove'; 'become' (MW: 117)

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.