- -es [iz, əz, z][ME < OE -as, pl. inflection of masc. nouns] suffix1. forming the plural of nouns ending in the sounds (s), (z), (sh), and (ch): an apostrophe can then be added to form the possessive plural [glasses, buzzes, fishes; witches']2. [ME < Northumbrian OE -s, 3d pers. sing., pres. tense inflection of verbs] forming the 3d person sing., pres. indic., of certain verbs [he kisses]
English World dictionary. V. Neufeldt. 2014.