What is a stroke of satire or sarcasm; an expression or retort that cuts or gives pain; a cut. The moral is a lash at the vanity of arrogating that to ourselves which succeeds well. L'Estrange called?

lash — A stroke of satire or sarcasm; an expression or retort that cuts or gives pain; a cut. The moral is a lash at the vanity of arrogating that to ourselves which succeeds well. L'Estrange. (Webster's 1913.)