Etymology

From Latin ūnus ‎(“one”) (twice) + septem ‎(“seven”) + -io ‎(“-ium”), after the element’s atomic number 117.

Pronunciation

• (Brazil) IPA^(key): /ˌu.nũ.ˈsɛp.t͡ʃi.u/, /ˌu.nũ.ˈsɛp.t͡ʃju/
• (South Brazil) IPA^(key): /ˌu.nũ.ˈsɛp.t͡ʃi.o/, /ˌu.nũ.ˈsɛp.t͡ʃjo/
• Hyphenation: u‧nun‧sép‧ti‧o