Merriam-Webster Logo
SINCE 1828
Menu
×

Thesaurus

unfathomable

adjective

Synonyms and Antonyms of unfathomable

1 being or seeming to be without limits
  • the unfathomable reaches of space
Synonyms of unfathomable

bottomless, boundless, endless, fathomless, illimitable, immeasurable, immensurable, indefinite, infinite, limitless, measureless, unbounded, unlimited
Words Related to unfathomable

abysmal

countless, incalculable, incomputable, inestimable, innumerable, unmeasured

exhaustless, inexhaustible

extensive, far-flung, immense, vast
Near Antonyms of unfathomable

fathomable, measurable

depthless, shallow, superficial
Antonyms of unfathomable

bounded, circumscribed, confined, definite, finite, limited, restricted
2 impossible to understand
  • For some unfathomable reason the family decided to venture out into the blizzard.
Synonyms of unfathomable

impenetrable, incomprehensible, ungraspable, unintelligible
Words Related to unfathomable

abstruse, enigmatic (also enigmatical), esoteric, indecipherable, inscrutable, recondite, unsearchable

cryptic, darkling, deep, mysterious, mystic, oblique, obscure, occult, uncanny

unanswerable, unknowable

baffling, bewildering, confounding, confusing, mystifying, perplexing, puzzling

inconceivable, unimaginable, unthinkable
Near Antonyms of unfathomable

basic, elemental, elementary, essential, fundamental, rudimentary, underlying

coherent, connected, ordered, orderly, organized, systematic, systematized

clear, cogent, compelling, convincing, lucid, pellucid, perspicuous, plain, straightforward
Antonyms of unfathomable

fathomable, intelligible, understandable

Learn More about unfathomable

  1. Dictionary: Definition of unfathomable Nglish: Translation of unfathomable for Spanish speakers Britannica English: Translation of unfathomable for Arabic speakers

Seen and Heard

What made you want to look up unfathomable? Please tell us where you read or heard it (including the quote, if possible).

show hide

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games