assent (v.) Look up assent at Dictionary.com
c.1300, from Old French assentir "agree; get used to" (12c.), from Latin assentare "to agree with," frequentative of assentire, from ad- "to" (see ad-) + sentire "to feel, think" (see sense (n.)). Related: Assented; assenting.
assent (n.) Look up assent at Dictionary.com
early 14c., "consent, approval," from Old French assent, a back-formation from assentir (see assent (v.)).