Other forms: agreed, agrees, agreeing
To agree is to think the same thing as someone else, and say so. A nod across the table, a quiet I agree, two people deciding the film was far too long.
The prepositions are the whole difficulty. You agree WITH a person or an opinion, you agree TO a plan or a request, you agree ON a date or a price, and you agree THAT something is the case. British English also lets you agree a price with no preposition at all. Agree is a verb, so it is I agree, never I am agree — that is the commonest mistake there is with this word. The opposite is disagree, the noun is agreement, and there is a food use worth knowing: if something does not agree with you, it makes you feel ill.
1verbagreeTo have the same opinion as someone, and say so.~40%
“We agree about almost nothing, which is why the meetings run long.”
synonyms: concur
2verbconsentTo say yes to a plan, a request or a condition.~29%
“He agreed to lend us the van for the weekend.”
3verbreachTo reach a decision together.~22%
“They agreed on a price and shook hands.”
4verbfood(of food) to suit someone's stomach.~2%
“Shellfish does not agree with me.”
5verbstatements(of statements or figures) to match one another.~7%
“The two accounts of the evening do not agree.”
Shares are an estimate: a language model read 27 sentences found in the wild and placed 27 of them on a sense — a count of our sample, not a measurement of English.
Old French agreer meant to accept something kindly, from the phrase a gré, favourably. Behind that sit Latin ad, to, and gratus, pleasing — the gratus that also gives grateful and gratitude. To agree, at the start, was to find a thing to your taste.
Proto-Indo-European
*gʷerH- — to welcome, greet, praise
Latin
ad — to
Old French
agreer — to accept or receive kindly
Middle English
agreen
English, today
agree
Built from
From Middle English agreen, from Old French agreer (“to accept or receive kindly”), from a gré (“favorably”), from Latin ad (“to”) + gratus (“pleasing”), ultimately from Proto-Indo-European gʷerH- (“to welcome, greet, praise”).
Etymology from Wiktionary, CC BY-SA