"The company's massive profits belie the claim that the industry is in decline." (The success proves the "decline" theory wrong). Practice Quiz

The word (/bɪˈlaɪ/) is a verb used when something gives a false impression or contradicts a reality. It often describes a situation where an outward appearance hides a deeper truth. Quick Definitions To contradict: To show that something is false. To disguise: To give a false impression of something. Usage in Context

because the sentence states she has "exhaustion."

because they mean the opposite; "belie" suggests a contradiction, not agreement.