Because the old thermometer gave inconsistent readings, the laboratory staff deemed it unreliable for precise chemical experiments.
因为旧温度计读数不一致，实验室工作人员认为它在精确化学实验中不可靠。
Which choice best defines “unreliable”?
D — Not able to be trusted or depended on. “unreliable” means not able to be trusted or depended on.
Which word means “not able to be trusted or depended on”?
C — unreliable. “unreliable” means not able to be trusted or depended on.
unreliable — not able to be trusted or depended on. In Chinese: 不可靠的.
unreliable is pronounced /ˌʌnrɪˈlaɪəbl/.
Because the old thermometer gave inconsistent readings, the laboratory staff deemed it unreliable for precise chemical experiments. (因为旧温度计读数不一致，实验室工作人员认为它在精确化学实验中不可靠。)
undependable, untrustworthy, erratic — all close in meaning to unreliable (not able to be trusted or depended on).
reliable, dependable — each the opposite of unreliable (not able to be trusted or depended on).
Yes. unreliable 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.