Early Quenya
auqa
adjective. awkward, clumsy (of things), difficult
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!
A word in the Qenya Lexicon of the 1910s appearing as ᴱQ. auqa “awkward, clumsy (of things); awkward, difficult”, an adjectival form of ᴱQ. auk “a fool, clumsy fellow” (QL/33).
Neo-Quenya: I would retain ᴺQ. auqua for purposes of Neo-Quenya, but mainly in the sense “awkward, clumsy” applicable to both people and things. For “difficult” I would use hraia and hranga.