The astronomer marveled at the boundless expanse of stars visible through the telescope on a clear night.
天文学家惊叹于晴朗夜晚通过望远镜可见的无限星空。
Which choice best defines “boundless”?
B — Having no limits. “boundless” means having no limits.
Which word means “having no limits”?
B — boundless. “boundless” means having no limits.
boundless — having no limits. In Chinese: 无限的，无边无际的.
boundless is pronounced /ˈbaʊndləs/.
The astronomer marveled at the boundless expanse of stars visible through the telescope on a clear night. (天文学家惊叹于晴朗夜晚通过望远镜可见的无限星空。)
limitless, unbounded, infinite — all close in meaning to boundless (having no limits).
limited, finite — each the opposite of boundless (having no limits).
Yes. boundless 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.