for·think | \ fərˈthiŋk \
forthought\-ˈthȯt \; forthought; forthinking; forthinks

Definition of forthink 

transitive verb

now chiefly Scottish : to change the mind of (oneself) often : regret

intransitive verb

now chiefly Scottish : to have a change of mind or a feeling of regret

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History and Etymology for forthink

Middle English forthinken, forthenken to regret, repent, displease, be displeased; partly from for- + thinken to seem; partly from Old English forthencan to mistrust, despise, despair, from for- + thencan to think

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