出典:Wiktionary
From Middle English -estere, -ester, from 古期英語 -estre (“-ster”, feminine agent suffix), from Proto-West Germanic *-astrijā, of disputed origin. Cognate with Middle Low German -ester, Dutch -ster.
-ster
the stern
tuataras
the instep
rudds
saigas
tetras
a flag
firebugs
スズドリ
bellbirds
トートグ
tautogs
a shield
テグー
tejus