-es 1
a plural suffix occurring in loanwords from Greek: Hyades.
[ -es ]
-es 2
var. of -s 2 in verbs ending in s, z, ch, sh, or post-consonantal y: passes; buzzes; pitches; dashes; studies.
-es 3
var. of -s 3 in nouns ending in s, z, ch, sh, or post-consonantal y, and in nouns in f with v in the plural: losses; fuzzes; riches; ashes; babies; sheaves.