Etymology Recorded in Middle English since circa 1225, borrowed from Old French consentir, from Latin cōnsentīre (“to agree; to assent, consent”), itself from com- (“with”) + sentiō (“to feel”) (whence con-).
1
To express willingness, to give permission.
After reflecting a little bit, I've decided to consent to her practising the piano in the house.
My poverty, but not my will, consents.c. 1591–1595 (date written), William Shakespeare, “The Tragedie of Romeo and Ivliet”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act V, scene i]:
2
Medicine, Sciences To cause to sign a consent form.
When the patient was consented to enter the study and registered, a telephone call was made to research assistant2002, T Usmani with KD O'Brien, HV Worthington, S Derwent, et al., “A randomized clinical trial to compare the effectiveness of canine lacebacks with reference to canine tip”, in Journal of Orthodontics, volume 29, number 4, →DOI, →PMID:
Interpreters […] will not consent it to be a true story.1643, J[ohn] M[ilton], The Doctrine and Discipline of Divorce: […], London: […] T[homas] P[aine] and M[atthew] S[immons] […], →OCLC:
4
To agree in opinion or sentiment; to be of the same mind; to accord; to concur.
And Saul was consenting unto his death.1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC, Acts 8:1:
Flourishing many years before Wyclif, and much consenting with him in judgment.1655, Thomas Fuller, The Church-history of Britain; […], London: […] Iohn Williams […], →OCLC, (please specify |book=I to XI):
Etymology Recorded in Middle English since circa 1225, borrowed from Old French consentir, from Latin cōnsentīre (“to agree; to assent, consent”), itself from com- (“with”) + sentiō (“to feel”) (whence con-).
1
Voluntary agreement or permission.
All men know by experience, there be some parts of our bodies which often without any consent of ours doe stirre, stand, and lye down againe.1603, Michel de Montaigne, chapter 6, in John Florio, transl., The Essayes […], book II, London: […] Val[entine] Simmes for Edward Blount […], →OCLC:
2
Obsolete Unity or agreement of opinion, sentiment, or inclination.
And they all with one consent began to make excuse.1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC, Luke 14:18: