oversimple

o·ver·sim·ple

O0193000 (ō′vər-sĭm′pəl)adj. Too simple; not thoroughgoing: oversimple explanations of complex phenomena.
o′ver·sim′ply adv.

oversimple

(ˌəʊvəˈsɪmpəl) or

oversimplistic

adjexcessively simple