Learn how to say Bootes correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Boötes:
a northern constellation (the Herdsman), said to represent a man holding the leash of two dogs (Canes Venatici) while driving a bear (Ursa Major). It contains the bright star Arcturus.
(as genitive Boötis /bəʊˈəʊtɪs/) used with preceding letter or numeral to designate a star in this constellation:
the star Gamma Boötis