Insentient comes from in- ('not') + sentient, from Latin sentiens, present participle of sentire ('to feel, perceive'). The etymological trail includes Latin in- and Latin sentire. As an adjective, insentient means incapable of feeling or perception; lifeless. The same family is visible in derived forms such as insentience and related forms such as sentient, sentience, sense, and insensate. Morphologically, the word is built from the elements named in its history, so the modern form preserves a visible compound, prefix, or suffix structure.