接頭辞a-はad-と同じで、行く。-greeは、grat, to gratifyとともに、gratify, to gratifyを参照。
英語の語源
agree
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 (v.)
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.
例文
1. The dampness of the forest did not agree with him physically.
彼の体は森の湿気に適応できない。
2.It remains to be seen whether parliamentary colleagues will agree .
彼女の国会同僚が同意したかどうかは、今のところ分からない。
3.I think you 'd agree he 's a very respected columnist.
尊敬されるコラムニストであることを認めなければならないと思います。
4.You and I are going to have to agree to disagree then.
では、あなたと私はそれぞれ異なる意見を残すしかありません。
5.They had little choice but to agree to what he suggested.