ineptitude

artless, natural, pure, native, confiding, simple, lain, inartificial, untutored, unsophisticated, ingenue, unaffected, naive; sincere, frank; open, open as day; candid, ingenuous, guileless; unsuspicious, honest; innocent; Arcadian; undesigning, straightforward, unreserved, aboveboard; simple-minded, single-minded; frank-hearted, open-hearted, single-hearted, simple-hearted., free-spoken, plain-spoken, outspoken; blunt, downright, direct, matter of fact, unpoetical; unflattering.