Definition of unguessable in English:

unguessable

Line breaks: un|guess¦able
Pronunciation: /ʌnˈgɛsəb(ə)l
 
/

adjective

Impossible to guess or imagine: a manor of an unguessable antiquity
More example sentences
  • Most experts gloomily predict temperatures rising unabated until 2100, when the world will be warmer by six degrees than it is today, an increase with almost unguessable consequences.
  • And you slump back, exhausted and bewildered, facing another wait of unguessable duration, and the pain and the fear continue.
  • I wish she'd told me so I could give her some kind of comfort, but as she'd said, the repercussions were unguessable.

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Pronunciation: ɪnˈvɛnəm
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put poison on or into; make poisonous