-ac

-ac · suffix¹

1. Ancient Greek · derived from-ακός“-ic”
2. New Latin · derived from-acus
3. French · derived from-acque
4. English today-ac

From French -acque, from New Latin -acus, from Ancient Greek -ακός (-akós, “-ic”). Related to -ic and -y.

-ac · suffix²

From acetic acid, which is used in the synthesis of many of these compounds.