Both Uses of

precipitate

in

Gulliver's Travels

But hurried on by the precipitancy of youth, and having his imperial majesty's license to pay my attendance upon the emperor of Blefuscu, I took this opportunity, before the three days were elapsed, to send a letter to my friend the secretary, signifying my resolution of setting out that morning for Blefuscu, pursuant to the leave I had got; and, without waiting for an answer, I went to that side of the island where our fleet lay.†
Chpt 1 (definition 1) *

…operated contrary to each other; that we ate when we were not hungry, and drank without the provocation of thirst; that we sat whole nights drinking strong liquors, without eating a bit, which disposed us to sloth, inflamed our bodies, and precipitated or prevented digestion; that prostitute female Yahoos acquired a certain malady, which bred rottenness in the bones of those who fell into their embraces; that this, and many other diseases, were propagated from father to son; so that…†
Chpt 4 (definition 2) *

Definitions:

(1) (precipitate as in: a precipitate decision)
acting with great haste -- often without adequate thought

(2) (precipitate as in: it precipitated a revolution)
make something happen or to fall or move -- typically suddenly and often of something undesired