disconclude
/ˌdɪskənˈkluːd/ /ˌdɪskəŋˈkluːd/rare
verb
[no object] And with object. To change one's mind about something previously concluded.
Origin
Early 17th century; earliest use found in John Florio (1553–1625), author and teacher of languages. From dis- + conclude, originally after Italian †disconchiudere to desist from, to refrain from completion of (an undertaking).