mountainous

adj. having many mountains or high, rocky land.

adj. characterised by the presence of many mountains; having a high, rugged, or rocky terrain.

“The northern part of the country is very mountainous and difficult to travel through.”

“The mountainous terrain of the Andes presents significant logistical challenges for engineers attempting to construct modern highways across the range.”

adj. looking like a mountain because it is so big or tall.

adj. resembling a mountain in size or scale; immense, towering, or exceptionally large.

“The ship was hit by a mountainous wave during the storm.”

“The climbers were dwarfed by the mountainous ice formations that had shifted during the previous night's blizzard.”

adj. extremely hard to do, like climbing a giant mountain.

adj. metaphorically referring to a task or obstacle that is extremely difficult to overcome.

“The new government faced a mountainous task in rebuilding the economy.”

“The legal team was confronted with a mountainous volume of evidence that required months of meticulous review before the trial could proceed.”

Literary