thicken
vt. 使变厚；使模糊；使……变复杂
vi. 变浓；变厚；变得模糊；变粗；变复杂
例句
As we age, the lenses of the eyes thicken, and thus refract light differently.
随着我们年龄的增长，眼睛的晶状体变厚，因此对光线的折射也会发生变化。
《柯林斯英汉双解大词典》
The gloom began to thicken, by-and-by, and the King realised that the night was coming on.
渐渐地，黑暗开始变浓了，国王意识到黑夜即将来临。
Beat the eggs and sugar until they start to thicken.
将蛋和奶油搅打到开始变黏稠为止。
