"flavorless" in the adjective sense
1. bland, flat, flavorless, flavourless, insipid, savorless, savourless, vapid
lacking taste or flavor or tang
"a bland diet"
"insipid hospital food"
"flavorless supermarket tomatoes"
"vapid beer"
"vapid tea"
Source: WordNet® (An amazing lexical database of English)
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