The museum's new wing is a complement to its original galleries, offering additional exhibition space.
博物馆的新翼是其原有展厅的补充，提供了额外的展览空间。
Which choice best defines “complement”?
B — Something that completes or makes perfect. “complement” means something that completes or makes perfect.
Which word means “something that completes or makes perfect”?
A — complement. “complement” means something that completes or makes perfect.
complement — something that completes or makes perfect. In Chinese: 补充物，补足物.
complement is pronounced /ˈkɒmplɪmənt/.
The museum's new wing is a complement to its original galleries, offering additional exhibition space. (博物馆的新翼是其原有展厅的补充，提供了额外的展览空间。)
supplement, counterpart, completion — all close in meaning to complement (something that completes or makes perfect).
Yes. complement is on the SAT Prep Easy list — mid-frequency academic words that do get tested. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.
com(together) + plement(fill) → to fill together → complement, supplement.