ADJ. dense, thick | impenetrable | dark | native, natural | ancient, primeval, virgin | rain (also rainforest), tropical | coniferous, deciduous | beech, birch, pine, etc.
QUANT. stretch, tract a large stretch of virgin forest
VERB + FOREST plant | chop down, clear, cut down, destroy Forest is being cleared to make way for new farming land. | be covered by/in/with Much of Europe was once covered in forest.
FOREST + VERB stretch Thick forest stretched as far as the eye could see.
FOREST + NOUN tree | floor | land | fire
PREP. in a/the ~ They got lost in the forest. | through a/the ~ We slashed our way through the dense forest.
PHRASES the edge/heart/middle of the forest