dense

Definitions

Straight from Latin dēnsus, 'thick, packed.' The literal sense is things crowded close together — dense fog, dense forest. From 'thick and hard to get through,' English aimed the same word at the mind: a dense person is hard to get an idea into, i.e. slow-witted.

Why It Means This

The leap worth noticing is from physical thickness to mental thickness. If a substance is so thick that nothing passes through it, the same word can describe a brain that won't let an idea through. That's why 'dense fog' and 'don't be so dense' use the exact same word — one blocks light, the other blocks understanding.

Common Collocations

• 1.dense fog浓雾
• 2.dense forest密林
• 3.dense crowd密集人群
• 4.dense traffic密集车流
• 5.densely populated人口稠密

Example Sentences

• 1.

  We drove slowly through the dense fog on the mountain road.

• 2.

  The hikers got lost in the dense forest before noon.

• 3.

  This textbook is so dense that one page takes an hour to read.

• 4.

  Sorry, I'm being dense — can you explain that one more time?

Easily Confused

dense vs thick — Both mean 'packed,' but thick is about width/depth from side to side (a thick book, thick walls), while dense is about how much is crammed into a space (dense fog has a lot of water packed in; thick fog overlaps here but you'd never say a 'dense book' for a long one). For fog both work; for a wide object use thick, for packed-together stuff use dense.

Synonym Comparison