Meaning

verb be in accord; be in agreement

verb consent or assent to a condition, or agree to do something

verb be compatible, similar or consistent; coincide in their characteristics

originFrom Middle English agreen, from Old French agreer (“to accept or receive kindly”), from a gré (“favorably”), from Latin ad (“to”) + gratum (“pleasing”), ultimately from Proto-Indo-European *gʷerH- (“to welcome, greet, praise”).

Etymology from Wiktionary, CC BY-SA 3.0