The word "out thrusts" refers to something that protrudes or extends outward. Its antonyms, on the other hand, would be words that describe something that is recessed or inward. These antonyms include words such as sunken, hollow, concave, indented, depressed, and cave-in. When used in the context of architecture or infrastructure, antonyms for out thrusts are most commonly used in reference to structures that are designed to blend in with their surroundings, rather than stand out. In literature, antonyms for out thrusts may be used to describe a character's physical appearance or personality traits, such as being introverted or reserved.