The Oxford Thesaurus An A-Z Dictionary of Synonyms - shallow adj.

1) surface, skin-deep, superficial, thin, empty, flimsy, trivial, unimportant, slight, frivolous, idle, foolish: If you read only comic books, your thoughts are bound to be shallow. 2) Often, shallows. shoal(s) , sand bar, sandbank, bank, shelf: This boat draws too much water to go fishing in the shallows.