trend
Pronunciation: /trɛnd/
noun
verb
- 1change or develop in a general direction: unemployment has been trending upwards
- (be trending) (of a topic) be popular or the cause of much discussion on a news or social networking website: I’ve just taken a quick look at what’s trending on Twitter right now (as adjective trending) today’s top trending topics

Origin:
Old English trendan 'revolve, rotate', of Germanic origin; compare with trundle. The verb sense 'turn in a specified direction' dates from the late 16th cent, and gave rise to the figurative use 'develop in a general direction' in the mid 19th century, a development paralleled in the noun