descriptive · swaying, quivering, or vibrating lightly, often used for light, shadows, or delicate objects

在那张破旧的小桌上，一盏油灯正颤巍巍地燃着。

descriptive · shaking or walking unsteadily, typically due to old age, physical weakness, or fear

老爷爷拄着拐杖，颤巍巍地走下了楼梯。