The genitive case thanks, Middle English thankes, lit. ‘of thought’, ‘of good will’, was used adverbially in sense ‘willingly, voluntarily’, esp…

Consent.

granting, consent.

The concurrence of the will, compliance with a desire. archaic and repl. by consent, except as in sense 2.

Voluntary agreement to or acquiescence in what another proposes or desires; compliance, concurrence, permission.

Consent, agreement; assent, compliance.

Accordance in operation or opinion; co-operation; consent; = concurrence, n. 3 4.

Consent, agreement.

Avowal, sanction.

Consenting state; consent.