A noun appearing as ᴱQ. iqista “a request” in the Qenya Lexicon of the 1910s under the early root ᴱ√IQI “request, ask for” (QL/43). Tolkien said that “by itself it = if you please, please”.

Neo-Quenya: I would retain ᴺQ. iquista “request” for purposes of Neo-Quenya along with related words, based on the Neo-Root ᴺ√IKWI(S). For “please” as marker of politeness, I would use the later formation mecin.