Meaning of -AD in English

-AD

1.

suffix forming nouns:

1. in collective numerals (myriad; triad).

2 in fem. patronymics (Dryad).

3 in names of poems and similar compositions (Iliad; Dunciad; jeremiad).

Etymology: Gk -as -ada 2.

suffix forming nouns (ballad; salad) (cf. -ADE(1)).

Etymology: F -ade

Oxford English vocab.      Оксфордский английский словарь.