The ancient desert landscape appeared unchanging, its dunes shifting so slowly that centuries passed without noticeable alteration.
古老的沙漠景观似乎一成不变，其沙丘移动得如此缓慢，以至于几个世纪过去都没有明显的变化。
Which choice best defines “unchanging”?
C — Staying the same. “unchanging” means staying the same.
Which word means “staying the same”?
B — unchanging. “unchanging” means staying the same.
unchanging — staying the same. In Chinese: 不变的.
unchanging is pronounced /ʌnˈtʃeɪndʒɪŋ/.
The ancient desert landscape appeared unchanging, its dunes shifting so slowly that centuries passed without noticeable alteration. (古老的沙漠景观似乎一成不变，其沙丘移动得如此缓慢，以至于几个世纪过去都没有明显的变化。)
constant, invariable, stable — all close in meaning to unchanging (staying the same).
changing, variable — each the opposite of unchanging (staying the same).
Yes. unchanging 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.