Comparative evidence

1.drem

• OInd. dram- ‘run about’, ‘roam’, ‘wander’ (MW: 500; Whitney 1885: 79)

Whitney: “Compare roots dram- and dru-. The intensive stem daridrā- is reckoned by the Hindu grammarians as a root, and artificially furnished with a set of verb-forms and primary Derivatives”.

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.