Etymology:  <  classical Latin -mōnia (feminine), -mōnium (neuter)  <  -mōn-   (related by ablaut to the suffix -men  : see -ment suffix) + -ia  , -ium  -y suffix3, -y suffix4. Compare French -monie.Occurring only in nouns adopted  <  Latin; in acrimony n., ceremony n., parsimony n., querimony n., sanctimony n., it represents classical Latin -mōnia  , and in matrimony n., mercimony n., patrimony n., testimony n., it represents classical Latin -mōnium  ; for alimony n.   there are two Latin forms alimōnia  , alimōnium  , the former being pre- and post-classical. Most were borrowed in late Middle English (in some cases through French) or early modern English, the latest (apart from a few words of limited currency) being alimony n.   (17th cent.). An isolated formation on an English root is agreemony n.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2021).