Emily Dickinson Lexicon

WHIF'FLE, v.t. [D. weifelen, to waver; zweeven, to hover. This accords in sense with G. zweifeln, to doubt, which would seem to be from zwei, two, or its root. The G. has also schweifen, to rove or wander, which seems to be allied to sweep. The D. has also twyffelen, to doubt, from twee, two, or its root; Sw. tvifla, Dan. tvivler, from the root of two. Yet whiffle seems to be directly from whiff.]

To start, shift and turn; to change from one opinion or course to another; to use evasions; to prevaricate; to be fickle and unsteady. A person of whiffling and unsteady turn of mind, can not keep close to a point of a controversy. – Watts.