The Chinese word "十一" (shí yī), meaning "eleven", is formed through a logical and additive compositional method inherent to the Chinese numerical system. It directly combines the character for "ten" (十, shí) with the character for "one" (一, yī), resulting in the transparent meaning of "ten and one". This pattern is systematic and applies to all numbers from 11 through 19, establishing a clear and efficient base-10 structure without the need for unique lexical terms for the teens.