To remove a ring from something; to deprive of a ring.
From dis- + ring (noun). A simple formation where dis- adds the meaning of removal or deprivation to the noun ring.
This is an extremely rare word, but it's a perfect example of English's flexibility—if you can say 'ring' as a verb (to put on a ring), you can say 'disring' (to remove it). Most people just say 'remove the ring' instead.
Complete word intelligence in one call. Free tier — 50 lookups/day.