mass noun
1
- the process or result of becoming broader, deeper, or denser增厚（或粗、密、浓等）。
1.1
- count noun a broader, deeper, or denser area of animal or plant tissue加厚组织。
- becoming broader, deeper, or denser变厚（或粗、密、浓等）的：
a hazardous journey through thickening fog.
穿行在渐厚浓雾中的危险行程。