vocative

“He told me to keep my eyes open super wide,” Waters told Vocative.

The vocative alone often takes a final a as in the interrogative form.

Ahaygar; a pet term; my friend, my love: vocative of Irish tagur, love, a dear person.

Avourneen, my love: the vocative case of Irish muirnn, a sweetheart, a loved person.

Vocative, vok′a-tiv, adj. pertaining to the act of calling, applied to the grammatical case used in personal address.

It is a different word altogether, and is only the subjunctive of am, in the way puss is the vocative of cat.