unpronounceable

adj (of a word, esp a name) too difficult to pronounce （指字, 尤指名字）难得发不成音的.

unpleasantness, unplug, unpopular, unpopularity, unpractised, unprecedented, unprecedentedly, unpredictable, unprejudiced, unpremeditated, unprepossessing, unpretentious, unprincipled, unprintable, unproductive, unprofessional, unprofessionally, unprofitable, unpromising, unprompted, unprovided, unprovoked, unpunished, unputdownable, unqualified, unquestionable, unquestionably, unquestioned, unquestioning, unquestioningly, unquiet, unquote, unravel, unread, unreadable, unreadiness, unreal, unrealistic, unreality, unreasonable,