Latin aethēr

→ English ether (derived)

→ Catalan èter (derived)

→ Danish æter (derived)

→ Esperanto etero (mention)

→ French éther (mention)

→ Italian etere (mention)

→ Dutch ether (derived)

→ Polish eter (derived)

→ Portuguese éter (derived)

→ Romanian eter (borrowed)

→ Tocharian B intsau (cognate)