Learn how to say Trickiest correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word tricky:
adjective (trickier, trickiest)
1(of a task, problem, etc.) requiring care and skill because difficult or awkward:
applying eyeliner can be a tricky business
the radio is tricky to operate
2deceitful or crafty:
I wouldn’t trust her—she’s tricky