confidential

definition: 
(of information) given in confidence or in secret
sentence: 
Securities laws have been relaxed to allow insider trading of confidential information.
difficulty: 
very easy
toefl frequency: 
3
toefl classification: 
adverb: 
confidentially
adjective: 
confidential
adverb sentence: 
adjective sentence: 
verb: 
confide
verb sentence: 
noun: 
comfidant
noun sentence: