How did the meaning of the word “belie” change over time?

The word "belie" originates from the Old English belēogan, which is composed of the prefix be- and the verb lēogan, meaning "to lie" or "to deceive". While you may associate the term primarily with modern definitions of deception, its etymological roots are directly tied to the act of lying.1

Since its first known use before the 12th century, the term has maintained a consistent core related to misrepresentation. Its primary meanings today include:1

• Giving a false impression: Presenting an appearance that does not align with reality (e.g., a calm demeanor that belies inner strength).21
• Contradiction: Proving something to be false or running counter to a claim or theory.21
• Disguise: Keeping something secret or obscuring it from view.21

Essentially, the word has evolved from its literal Old English root meaning "to lie" into a more nuanced verb used to describe how appearances or evidence can misrepresent, refute, or mask the truth.21