insipide
Insipide is an adjective meaning lacking flavor, taste, or vigor; something insipid is bland, dull, or uninteresting. In culinary contexts it describes foods or drinks whose flavor is weak or unremarkable. In broader use it can describe colors, performances, or ideas that fail to excite or engage.
Origin and cognates: From Latin insipidus 'tasteless', through Old French insipide into English as insipid; the
Usage notes: The term is common in English; insipidness or insipidity can be used as noun form.
Related terms: bland, flavourless, dull, vapid; synonyms in French: fade, sans goût; antonym: piquant, savoureux.