I. noun plural suffix
Etymology: Middle English -es, -s — more at (1)-s
— used to form the plural of most nouns that end in s <glasses>, z <fuzzes>, sh <bushes>, ch <peaches>, or a final y that changes to i <ladies> and of some nouns ending in f that changes to v <loaves> — compare -s I II. verb suffix Etymology: Middle English — more at (3)-s — used to form the third person singular present of most verbs that end in s <blesses>, z <fizzes>, sh <hushes>, ch <catches>, or a final y that changes to i <defies> — compare -s III
New Collegiate Dictionary. 2001.