mána 1) adj. "blessed" (FS); also manna, q.v. 2) noun “any good thing or fortunate thing; a boon or ‘blessing’, a grace, being esp. used of some thing/person/event that helps or amends an evil or difficulty. (Cf. frequent ejaculation on receiving aid in trouble: yé mána (ma) = ‘what a blessing, what a good thing!)“ (VT49:41)
manainterogative, a word translated "what is" in the sentence mana i-coimas Eldaron[?] "what is the coimas (lembas) of the Eldar?" (PM:395, a variant reading in PM:403) Either this is *ma "what" + ná "is", or mana may itself be a unitary word "what", and there is not really any word meaning "is" in the sentence. Since ma is assigned other meanings elsewhere, the latter interpretation may be the more likely.