monumental
/ˌmɑnjəˈmɛnəɫ/
massive in size, importance, or endurance
monumental in a sentence
“A monumental achievement in engineering.”
Origin of monumental
Latin monumentum (memorial)
Related Words
labyrinthine
irregular and twisting; highly intricate and confusing
cryptic
having a meaning that is mysterious or obscure
inscrutable
impossible to understand or interpret
hieroglyphic
difficult to decipher; enigmatic or symbolic
hermetic
complete and airtight; relating to ancient occult tradition
sphinx-like
inscrutable, mysterious, and silent