Source : Webster's Revised Unabridged Dictionary (1913)

Bothersome \Both"er*some\, a.
   Vexatious; causing bother; causing trouble or perplexity;
   troublesome.

Source : WordNet®

bothersome
     adj : causing irritation or annoyance; "tapping an annoying rhythm
           on his glass with his fork"; "aircraft noise is
           particularly bothersome near the airport"; "found it
           galling to have to ask permission"; "an irritating
           delay"; "nettlesome paperwork"; "a pesky mosquito";
           "swarms of pestering gnats"; "a plaguey newfangled
           safety catch"; "a teasing and persistent thought
           annoyed him"; "a vexatious child"; "it is vexing to
           have to admit you are wrong" [syn: {annoying}, {galling},
            {irritating}, {nettlesome}, {pesky}, {pestering}, {pestiferous},
            {plaguy}, {plaguey}, {teasing}, {vexatious}, {vexing}]