Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!

Qenya 

(a)láqainen

adverb. by no means

A correlative combination appearing as {láqainen >>} ᴹQ. (a)láqainen “by no means” in Demonstrative, Relative, and Correlative Stems (DRC) from 1948 (PE23/111), a combination of ᴹQ. láqa “none” and the instrumental suffix ᴹQ. -nen.

Neo-Quenya: For purposes of Neo-Quenya I would update this to ᴺQ. allanen “by no means” using later ᴹQ. alla “none”, also from DRC.