precipitate

definition: 
Cause (an event or situation, typically one that is undesirable) to happen suddenly, unexpectedly, or prematurely;Cause (a substance) to be deposited in solid form from a solution;
sentence: 
When substances are precipitated by inorganic or organic processes the material is known as chemical sediment.
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
adjective: 
adverb sentence: 
adjective sentence: 
verb: 
verb sentence: