Comparative evidence

h₃slei̯dʰ

• OInd. sridh- 'blunder' (Whitney 1885: 200); 'fail', 'err' (MW: 1274)

• OInd. sridh- 'erring', 'failing', 'misbeliever', 'foe', 'enemy' (MW: 1274)

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.