Flaw

Simple explanations: Flaw means a mistake, weakness, or imperfection in something or someone.

A flaw in a person → a bad habit or weakness Example: “Being impatient is his biggest flaw.” A flaw in a plan/system → something wrong that can cause problems Example: “There is a flaw in the design.” A flaw in an object → a physical defect Example: “The phone has a small flaw on the screen.”

Synonyms: Weakness Defect Fault Imperfection