浓重 (nóng zhòng): หนาแน่น

In the early morning, the valley was filled with dense fog, making it almost impossible to see the mountain path in the distance.

He spoke with a thick accent; I knew immediately he was from the Northeast.

A strong aroma wafted from the kitchen; it turned out that Mom was stewing braised pork.

That incident left him with a deep psychological shadow; even years later, he still doesn't want to bring it up.