épais

In a sentence

• Le livre qu'il lisait avait une couverture épaisse.

  The book he was reading had a thick cover.

  Here, "épaisse" describes the physical thickness of the book's cover, indicating its material strength or density.

• Cette soupe est trop épaisse pour être consommée telle quelle.

  This soup is too thick to be consumed as is.

  In this sentence, "épaisse" refers to the consistency of the soup, implying it is dense and possibly needs to be diluted.

• La forêt était si épaisse qu'il était difficile de voir à travers.

  The forest was so dense that it was difficult to see through.

  Here, "épaisse" is used metaphorically to describe the density of the forest, indicating closely packed elements such as trees and foliage.