There is one thing I think it my duty to caution you against: the precipitancy with which young men frequently rush into matrimonial engagements, and by their thoughtlessness draw many a deserving woman into scenes of poverty and distress.
-- Susanna Rowson, Charlotte Temple
The police authorities have acted in this matter with undue precipitancy.
-- Joseph Smith Fletcher, Green Ink and Other Stories
Precipitancy comes from the Latin word praecipitāre meaning "to cast down headlong."