Akademik

uncaused
adjective
having no cause or apparent cause (Freq. 1)
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a causeless miracle

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fortuitous encounters—strange accidents of fortune

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we cannot regard artistic invention as...uncaused and unrelated to the times

Syn: ↑causeless, ↑fortuitous
Similar to: ↑unintended
Derivationally related forms: ↑fortuitousness (for: ↑fortuitous)

Useful english dictionary. 2012.