colossal
1. [ adjective ] (antiquity) so great in size or force or extent as to elicit awe
Synonyms: prodigious stupendous
Examples:

"colossal crumbling ruins of an ancient temple" "has a colossal nerve" "a prodigious storm" "a stupendous field of grass" "stupendous demand"

Related terms: large
Similar spelling:   collegial
  Collocalia