mountainously

Like vast peaks

In a manner suggesting mountains—massive, towering, or overwhelming in scale.

The adverb is rare, appearing occasionally in literary contexts: The waves rose mountainously before the small boat.

Debt piled mountainously upon debt.

daunting

insurmountably

Beyond ability to overcome

formidably · arduously · challengingly · steeply · treacherously · laboriously · strenuously · demandingly · grueling · taxingly

immense

colossal

Extremely large in scale

vast · towering · tremendous · gargantuan · titanic · monumental · hugely · staggeringly · overwhelmingly · prodigiously

grandeur

majestically

In an impressive manner

gloriously · awe-inspiringly · breathtakingly · dramatically · scenically · panoramically · alpine · soaringly · loftily · impressively

Opposites
terrain/topography

mountainouslyflatly

Without expression or qualification

plainly · smoothly · levelness · gently · evenly

scale/magnitude

mountainouslytinily

In diminutive manner

minutely · slightly · minimally · negligibly · modestly

Phrases
Family

mountainous

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Everyday, not technical · Rated G