Comparative evidence

ḱens, ḱems

• OInd. śaṁs- 'praise' (Whitney 1885: 169); 'recite', 'repeat'; 'extol'; 'commend', 'approve'; 'vow', 'make a vow' (?); 'wish' (anything to), 'relate', 'say', 'tell', 'report', 'declare', 'announce'; 'foretell', 'predict', 'prognosticate'; 'calumniate', 'revile'; 'hurt', 'injure'; 'be unhappy' (MW: 1043-1044)

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.