A word appearing as ᴱQ. {maksa “soft, cooked, done” >>} maswa “soft, cooked, ripe” in the Qenya Lexicon under the early root ᴱ√M(B)ASA “cook, bake” (QL/59).
Neo-Quenya: For purposes of Neo-Quenya I would use the passive participle maxaina “cooked” from the verb ᴱQ. maksa- “cook”.
A verb appearing as ᴱQ. maksa- “cook” in the Qenya Lexicon under the early root ᴱ√M(B)ASA “cook, bake” (QL/59). A nearby alternate form mark- was added and then deleted.
Neo-Quenya: The root √MBAS continued to appear in Tolkien’s later writings, so I would retain ᴺQ. maxa- “cook” for purposes of Neo-Quenya from primitive ✱mbaskā-. The verbal suffix -kā is very unusual, and maxa- might instead be derived from an ancient noun or adjective.