Definition: not elegant or graceful in expression
Usage: an awkward prose style; a clumsy apology; his cumbersome writing style; if the rumor is true, can anything be more inept than to repeat it now?
Similar words: infelicitous
Definition: not appropriate in application; defective
Usage: an infelicitous remark; infelicitous phrasing; the infelicitous typesetting was due to illegible copy