ascertain

definition: 
Find (something) out for certain; make sure of
sentence: 
It would be appreciated if you would ascertain this information in a timely manner.
The jury made a decision based on its ascertainment of the facts.
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
adjective: 
adverb sentence: 
adjective sentence: 
verb: 
verb sentence: