كثُفَ يَكثُف، كثافةً، فهو كَثيف

غلُظ وثخُن

🇬🇧 Translation:

became thick and dense

تماسك وغلُظ.

🇬🇧 Translation:

became cohesive and thick (viscous).

كثُرت أشجارُها وازدحمت مع الالتفاف والتراكب.

🇬🇧 Translation:

its trees became dense and crowded, interlocking and overlapping.