Answer: stickiest

AnswerCrossword Clue
STICKIESTMost awkwardly difficult
stickiestSTICKY, tending to adhere
stickiest(of the weather) Hot and damp; muggy
stickiestTending or designed to stick to things on contact or covered with something that sticks
stickiestInvolving problems; difficult or awkward
stickiestDamp with sweat
stickiest(of prices, interest rates, or wages) Slow to change or react to change
stickiest(of a substance) Glutinous; viscous