Babblingly

adv. [f. prec. + -LY².] In a babbling manner, with babblement, chatteringly.

a. 1603.  T. Cartwright, Confut. Rhem. N. T. (1618), 562. Irksomely and bablingly repeated.

1862.  C. S. C[alverley], Verses & Transl., 157. Thou shalt be a royal fountain … From yon cavernous mountain Thou breakest babblingly.