The word "acerbic" originates from the Latin word "acerbus," which means "harsh," "bitter," or "sour." The connection between its origin and current meaning can be seen in the way the term has maintained its connotations of sharpness and intensity, both in a literal and figurative sense.
In its contemporary usage, "acerbic" often describes not only tastes—such as that of certain foods or beverages that are sour or bitter—but also attitudes or remarks that are biting, cutting, or sharply critical. The underlying theme of sharpness and intensity persists, whether referring to flavors or to the nature of someone's speech or demeanor. Thus, the evolution of the word from its Latin roots to its modern applications reflects a consistent association with bitterness and harshness in various contexts.