circulate

definition: 
move through a space, circuit or system, returning to the starting point
sentence: 
Women who tested positive for circulating tumor DNA were 12 times more at risk of cancer recurrence than those who tested negative.
No director for the new film has been announced, although rumors have been circulating that James would like to direct the movie himself.
difficulty: 
very easy
toefl frequency: 
3
toefl classification: 
adverb: 
adjective: 
circulatory
adverb sentence: 
adjective sentence: 
verb: 
circulate
verb sentence: 
noun: 
circulation
noun sentence: