Latin opacus

← Ancient Greek παχύς (cognate)

← Proto-Indo-European *apó (derived)

→ English opaque (derived)

→ English opacous (mention)

→ English opake (derived)

→ Middle English opake (derived)

→ Latin opacifrons (compound)

→ Ligurian lǜvegu (inherited)

→ Dutch opaak (derived)

→ Portuguese baço (mention)

→ Romanian opac (borrowed)