The word "吸收" is formed by combining the characters "吸" and "收". "吸" is constructed from the radical "口" (mouth), indicating an action related to taking in, and the phonetic component "及" which suggests its pronunciation. "收" is constructed from the radical "攵" (action) and the component "丩", contributing to its meaning of gathering or receiving. Together, these characters create a compound word where "吸" conveys drawing in and "收" conveys collecting, resulting in the meaning "to absorb".