Comparative evidence

grenth₂, gʷrenth₂

• OInd. grath-/granth- 'tie' (Whitney 1885: 39); 'fasten', 'string together', 'arrange', 'connect in a regular series'; 'string words together', 'compose' (a literary work); 'be strung together', 'be composed' (a literary work) (MW: 370)

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.