investigation

definition: 
the work of inquiring into something thoroughly and systematically
sentence: 
The comprehensive investigation of the bank revealed no illegal activity.
difficulty: 
very easy
toefl frequency: 
2
toefl classification: 
adverb: 
adjective: 
investigative
adverb sentence: 
adjective sentence: 
verb: 
investigate
verb sentence: 
noun: 
investigation
noun sentence: