The word 人尽其才 is formed by sequentially combining the characters 人 (person), 尽 (to exhaust or use fully), 其 (their), and 才 (talent), which are arranged in a subject-verb-object structure where 人 serves as the subject, 尽 as the verb, and 其才 as the object, with 其 modifying 才 to create the literal meaning "people use fully their talent".