IPA: /ˈfiːtʃərləs/
KK: /ˈfiːtʃərləs/
Having no special or interesting characteristics; plain or unremarkable.
The building was featureless, with no unique design elements to make it stand out.
Featureless → It is formed from "feature" (from Old French *feiture*, meaning a distinctive attribute or aspect) and "-less" (meaning without). The word "featureless" means lacking distinctive attributes or aspects.
Think of 'feature' as a distinctive quality and '-less' meaning without — so 'featureless' describes something that lacks distinctive qualities.