Depending on the will or pleasure of another; held by courtesy liable to be changed or lost at the pleasure of another. A privilege depending on another’s will is precarious, or held by a precarious tenure.

Uncertain; held by a doubtful tenure; depending on unknown or unforeseen causes or events. Temporal prosperity is precarious; personal advantages, health, strength and beauty are all precarious, depending on a thousand — accidents. We say also, the weather is precarious; a phrase in which we depart not more from the primary sense of the word, than we do in a large part of all the words in the language.