To substantiate his theory about ancient navigation, the researcher provided detailed maps and carbon-dated samples from several coastal sites.
为了证实他关于古代航行的理论，研究员提供了详细的地图和来自多个沿海遗址的碳定年样本。
Which choice best defines “substantiate”?
B — To prove; verify. “substantiate” means To prove; verify.
Which word means “To prove; verify”?
D — substantiate. “substantiate” means To prove; verify.
substantiate — To prove; verify. In Chinese: 证实， 证明.
substantiate is pronounced /səbˈstænʃieɪt/.
To substantiate his theory about ancient navigation, the researcher provided detailed maps and carbon-dated samples from several coastal sites. (为了证实他关于古代航行的理论，研究员提供了详细的地图和来自多个沿海遗址的碳定年样本。)
verify, confirm, corroborate — all close in meaning to substantiate (To prove; verify).
refute, disprove — each the opposite of substantiate (To prove; verify).
Yes. substantiate 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.
substance (essence) + iate → to confirm, to make concrete.