The archaeologist's hypothesis about the ancient settlement's layout was considered valid after multiple carbon-dating tests confirmed the timeline.
考古学家关于古代定居点布局的假说在多次碳定年测试确认时间线后被认为是合理的。
Which choice best defines “valid”?
B — Acceptable, well-grounded. “valid” means acceptable, well-grounded.
Which word means “acceptable, well-grounded”?
A — valid. “valid” means acceptable, well-grounded.
valid — acceptable, well-grounded. In Chinese: 有效的，合理的.
valid is pronounced /ˈvælɪd/.
The archaeologist's hypothesis about the ancient settlement's layout was considered valid after multiple carbon-dating tests confirmed the timeline. (考古学家关于古代定居点布局的假说在多次碳定年测试确认时间线后被认为是合理的。)
sound, legitimate, well-founded — all close in meaning to valid (acceptable, well-grounded).
invalid, fallacious — each the opposite of valid (acceptable, well-grounded).
Yes. valid 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.
valid(effective)