noun A word that represents a person, place, thing, or idea. In this case, 'sign' is a noun that refers to an indication or evidence of something.
adjective A word that describes or modifies a noun. In this case, 'telltale' is an adjective that describes the type of sign as being revealing or indicative of something.
A telltale sign of anxiety is excessive worrying and restlessness.
A telltale sign of a heart attack is chest pain and shortness of breath.
A telltale sign of a failing relationship is lack of communication and constant arguments.
A telltale sign of foul play is inconsistencies in the suspect's alibi.
A writer may use the term 'telltale sign' to describe a subtle clue or indication that foreshadows a future event in a story.
In psychology, a psychologist may use the term 'telltale sign' to refer to a behavioral or physical indicator that suggests a particular condition or problem.
A detective may use the term 'telltale sign' to describe a piece of evidence that points to a suspect or provides crucial information in solving a case.
A medical doctor may use the term 'telltale sign' to describe a symptom or characteristic that helps in diagnosing a specific medical condition.