Definition of ag- in English:

ag-

Syllabification: ag-

prefix

Variant spelling of ad- assimilated before g (as in aggravate, aggress).

Definition of ag- in:

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Word of the day hypnopompic
Pronunciation: ˌhɪpnə(ʊ)ˈpɒmpɪk
adjective
relating to the state immediately preceding waking up