- unimaginable as an adjective:
Roget 473: improbable, unlikely, contrary to all reasonable expectation; wild [Coll.], far out [Coll.], out of sight [Coll.], outtasight [Coll.], heavy [Coll.]. rare etc. (infrequent) 137; unheard of, ... show more
Moby thesaurus: a bit thick, a bit thin, absurd, antic, barred, beguiling, bewildering, beyond belief, closed-out, contrary to reason, doubtable, doubtful, dubious, dubitable, enigmatic, exceptional, excluded, extraordinary, fabulous, fanciful ... show more.
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