Merriam-Webster Collegiate Dictionary - impertinent

 adjective  Etymology: Middle English, from Anglo-French, from Late Latin ~-, impertinens, from Latin in- + pertinent-, pertinens, present participle of pertinere to pertain  Date: 14th century  1. not pertinent ; irrelevant  2.  a. not restrained within due or proper bounds especially of propriety or good taste ~ curiosity  b. given to or characterized by insolent rudeness an ~ answer  • ~ly adverb Synonyms:  ~, officious, meddlesome, intrusive, obtrusive mean given to thrusting oneself into the affairs of others. ~ implies exceeding the bounds of propriety in showing interest or curiosity or in offering advice resented their ~ interference. officious implies the offering of services or attentions that are unwelcome or annoying officious friends made the job harder. meddlesome stresses an annoying and usually prying interference in others' affairs a meddlesome landlord. intrusive implies a tactless or otherwise objectionable thrusting into others' affairs tried to be helpful without being intrusive. obtrusive stresses improper or offensive conspicuousness of interfering actions expressed an obtrusive concern for his safety.