Comparative evidence

h₁eh₁s

• OInd. ās- 'sit' (Whitney 1885: 6); 'sit down', 'rest', 'lie'; 'be present'; 'exist'; 'inhabit', 'dwell' (in); 'make one's abode' (in); 'sit quietly', 'abide', 'remain', 'continue'; 'cease', 'have an end'; 'solemnize', 'celebrate'; 'do without interruption'; 'continue'; 'last' (MW: 159)

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.