Invalider

Part of speech: adjective

Definitions

1. A person or thing that nullifies, cancels or renders something void ; to a greater degree lacking legal force or logical soundness
2. Something that makes another thing no longer valid or effective ; more lacking in legal standing or logical soundness than something else
3. An agent that voids or undermines a claim, rule or result ; comparatively less legally binding or logically sound than another example

Etymology: "Invalider" is the comparative of "invalid," the adjective meaning not valid, so it means more invalid or less valid. The base word comes from Latin "invalidus," meaning "weak" or "infirm," built from the negative prefix "in-" and "validus," "strong," which itself derives from "valere," "to be strong." The Latin sense of weakness carried into English, so the adjective has long described something lacking force or soundness.