unbelievable

adj.
Not to be believed; incredible: unbelievable luck.

unbelievably un'be·liev'a·bly adv.

adjective

1. Not to be believed: inconceivable, incredible, unimaginable, unthinkable. Idioms: beyond belief, contrary to all reason. See belief/unbelief.
2. Not plausible or believable: flimsy, implausible, improbable, inconceivable, incredible, shaky, thin, unconceivable, unconvincing, unsubstantial, weak. See likely/unlikely.
3. So remarkable as to elicit disbelief: amazing, astonishing, astounding, fabulous, fantastic, fantastical, incredible, marvelous, miraculous, phenomenal, prodigious, stupendous, wonderful, wondrous. See good/bad.

adj

Definition: beyond belief
Antonyms: believable, credible, plausible, real

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IN BRIEF: Astounding or incredible.

Our minds have unbelievable power over our bodies. — Andre Maurois (1885-1967).

Dansk (Danish)
adj. - utroligt

Nederlands (Dutch)
ongelooflijk, geweldig, absurd, ongeloofwaardig

Français (French)
adj. - incroyable

Deutsch (German)
adj. - unglaublich

Ελληνική (Greek)
adj. - απίστευτος

Italiano (Italian)
incredibile

Português (Portuguese)
adj. - inacreditável

Русский (Russian)
невероятный

Español (Spanish)
adj. - increíble

Svenska (Swedish)
adj. - otrolig

中文（简体）(Chinese (Simplified))
难以置信的

中文（繁體）(Chinese (Traditional))
adj. - 難以置信的

한국어 (Korean)
adj. - 믿을 수 없는, 거짓일 것 같은

日本語 (Japanese)
adj. - 信じられない

العربيه (Arabic)
‏(صفه) لا يصدق, غير قابل للتصديق‏

עברית (Hebrew)
adj. - ‮לא יאומן‬

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