The heron stood motionless at the water's edge, waiting for the slightest ripple to betray a fish beneath the surface.
苍鹭在水边一动不动地站着，等待水面最轻微的涟漪暴露水下的鱼。
Which choice best defines “motionless”?
B — Not moving; still. “motionless” means not moving; still.
Which word means “not moving; still”?
C — motionless. “motionless” means not moving; still.
motionless — not moving; still. In Chinese: 静止的，不动的.
motionless is pronounced /ˈmoʊʃənləs/.
The heron stood motionless at the water's edge, waiting for the slightest ripple to betray a fish beneath the surface. (苍鹭在水边一动不动地站着，等待水面最轻微的涟漪暴露水下的鱼。)
still, immobile, stationary — all close in meaning to motionless (not moving; still).
moving, active — each the opposite of motionless (not moving; still).
Yes. motionless 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.