The word "in-sentient" refers to something that lacks consciousness or awareness. Its antonyms are "sentient," "conscious," and "aware." Sentient refers to having the capacity to perceive or feel things. Conscious suggests being aware of one's surroundings, thoughts, and feelings. Aware generally means knowing something or having knowledge of something. Other antonyms for "in-sentient" include "intelligent," "perceptive," "sensitive," and "discerning." These words all refer to a degree of awareness, perception, or understanding that in-sentient objects or beings lack. Antonyms for in-sentient help distinguish the qualities and characteristics of living or cognitive entities from those that lack life, cognition, or sensory experiences.