Noah Webster
Queachy
QUE'ACHY, adjective [from queach.]
1. Shaking; moving, yielding or trembling under the feet, as moist or boggy ground.
The queachy fens.
Godwin's queachy sands.
[This word is still in use in New England, and if the word is from the root of quick, we recognize the application of it in quicksand.]
2. Thick; bushy. [Not in use.]