The 4th phrase of the prose Namárië. Tolkien altered the text from the poetic version as follows:
> mi oromardi lissë miruvóreva >> lissë miruvóreva mí oromardi
Tolkien moved the possessive element lissë miruvóreva “of sweet nectar” forward in the prose version so that it immediately follows the noun it modifies, namely the lintë yuldar “swift draughts” of the previous line. Thus “swift draughts of sweet mead” as in the English translation of the poem.
A word appearing in its plural form oromardi, referring to the dwelling of Varda and Manwë on the slopes of mount Taniquetil from the Namárië poem (LotR/377). It is a combination of oro- “up, aloft” and mar(da) “dwelling” (PE17/63-64). Though not a proper name, I suspect this word was poetic and not in general use.