- -ad
[-ad 词源字典] - word-forming element denoting collective numerals (Olympiad), plant families, and names of poems, from Greek -as (genitive -ados), a suffix forming fem. nouns; also used in fem. patronymics (Dryad, Naiad, also, in plural, Pleiades, Hyades).[-ad etymology, -ad origin, 英语词源]
