agreeyoudaoicibaDictYouDict[agree 词源字典]
agree: [14] Originally, if a thing ‘agreed you’, it was to your liking, it pleased you. This early meaning survives in the adjective agreeable [14], but the verb has meanwhile moved on via ‘to reconcile (people who have quarrelled)’ and ‘to come into accord’ to its commonest presentday sense, ‘to concur’. It comes from Old French agréer ‘to please’, which was based on the phrase a gré ‘to one’s liking’. Gré was descended from Latin grātum, a noun based on grātus ‘pleasing’, from which English also gets grace and grateful.
=> congratulate, grace, grateful, gratitude[agree etymology, agree origin, 英语词源]
agree (v.)youdaoicibaDictYouDict
late 14c., "to be to one's liking;" also "to give consent," from Old French agreer "to receive with favor, take pleasure in" (12c.), from phrase a gré "favorably, of good will," literally "to (one's) liking," from Latin ad "to" (see ad-) + gratum "pleasing," neuter of gratus (see grace (n.)); the original sense survives best in agreeable. Meaning "to be in harmony in opinions" is from late 15c. Related: Agreed; agreeing.