queachy

queachy: unsound, shaking (opp. to firm): e. g. "Godwin's q. sands" (Drayton), syrtes aestuosae (the true sense of aest. here, not burning), Hor. Od. 1, 22, 5: fluxus or mōbĭlis may also be used; or (poet.) infīdus: cf. "the queachy fens" (Drayton).