As adjectives the difference between riven and unriven
is that riven is torn apart while unriven is not riven.
As a verb riven
is .
riven
English
Verb
(head)
Usage notes
An alternative past participle of to rive is (rived), which is preferred in American English.
Adjective
(-)
torn apart
broken into pieces; split asunder
Anagrams
*
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unriven
English
Adjective
(-)
Not riven.