IPA: /ˈfleɪlərləs/
KK: /ˈfleɪvərləs/
Having no taste or lacking flavor.
The soup was flavorless and needed more spices.
Comparative: more flavorless
Superlative: most flavorless
Flavorless → It is formed from "flavor" (from Latin *flavor*, meaning taste or smell) and "-less" (meaning without). The word "flavorless" means without flavor or lacking taste.
Think of 'flavor' as the taste of something, and remember that 'flavorless' means it has no taste.