A plaintiff is a person who brings a case in a civil court. Plaintive is an adjective meaning sad or mournful, usually of a voice or sound. Memory hook: plaintiff ends in -iff like a legal person, while plaintive ends in -ive like other describing words such as sensitive.
The core difference
Plaintiff is a noun for the person suing, while plaintive is an adjective for a sad, mournful tone.
- plaintiff — the person who brings a civil lawsuit: The plaintiff argued that the company had breached the contract.
- plaintive — sounding sad or full of longing: The violin played a plaintive melody.
How to tell them apart
These two are relatives. Both come from Old French words connected with complaining, which is why they look so alike. Over time one went into the law courts and the other into descriptions of sad sounds.
A quick test is to ask whether you need a person or a description. If you are naming someone in a court case, use plaintiff. If you are describing a cry, song or voice, use plaintive.
