pitch-dark

The cave was pitch-dark, so we had to use flashlights to find the way.

用法提示：形容词“pitch-dark”表示完全黑暗。

When the storm knocked out the power, the entire house became pitch-dark.

用法提示：此处“pitch-dark”作表语形容词，描述黑暗程度。

The basement room was pitch-dark because there were no windows.

用法提示：“pitch-dark”强调没有光线，伸手不见五指。

it was pitch-dark in the cellar