controversial

definition: 
marked by or capable of arousing controversy
sentence: 
Vitamin D is a controversial topic among doctors, mainly because studies about its health effects have been so conflicting.
The Coca-Cola Company yesterday revealed some details about its controversial role as a supporter of obesity research.
difficulty: 
very easy
toefl frequency: 
3
toefl classification: 
adverb: 
controversially
adjective: 
controversial
adverb sentence: 
adjective sentence: 
verb: 
verb sentence: 
noun: 
controversy
noun sentence: