Definition

A person who is trained to use a device that measures physiological responses, often used to determine if someone is lying.

Example

The polygraphist analyzed the data from the lie detector test to assess the subject's truthfulness.

Conversation

Have you ever met a polygraphist?

No, I haven't. What do they do exactly?

They operate lie detector tests and analyze the results.

That sounds fascinating! I’d love to see one in action.

Synonyms & Antonyms

Root Explanation

Polygraphist → It is formed from "poly-" (from Greek "polus", meaning many) and "graphos" (meaning writing or drawing) and the suffix "-ist" (meaning one who practices or is concerned with). A polygraphist is someone who writes or draws in many different styles or forms.

Memory Tip

Think of 'many' ('poly-') types of 'writing' ('graphos') — that's why a polygraphist is someone skilled in various forms of writing.

Visually Confused Words