verb signifies, signifying, signified
1 with object Be an indication of.
1.1 Be a symbol of; have as meaning.
1.2 (of a person) indicate or declare (a feeling or intention)
1.3 no object, with negative Be of importance.
2 US informal no object (among black Americans) exchange boasts or insults as a game or ritual.
Middle English from Old French signifier, from Latin significare ‘indicate, portend’, from signum ‘token’.
To be human signifies being a hazard to other life.