The engineer removed the unnecessary components from the circuit, simplifying the design without affecting performance.
工程师从电路中移除了不必要的组件，简化了设计而不影响性能。
- Automakers initially considered the invention unnecessary and did not adopt it for over a decade.
From a Rhetorical Synthesis question · Expression of Ideas
Which choice best defines “unnecessary”?
D — Not needed or required. “unnecessary” means not needed or required.
Which word means “not needed or required”?
B — unnecessary. “unnecessary” means not needed or required.
unnecessary — not needed or required. In Chinese: 不必要的.
unnecessary is pronounced /ʌnˈnesəsəri/.
The engineer removed the unnecessary components from the circuit, simplifying the design without affecting performance. (工程师从电路中移除了不必要的组件，简化了设计而不影响性能。)
needless, superfluous, redundant — all close in meaning to unnecessary (not needed or required).
necessary, essential — each the opposite of unnecessary (not needed or required).
Yes. unnecessary is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. 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.