enn-

prefix

Used for the digit nine to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.

“un- (“1”) + un- (“1”) + enn- (“9”) + -ium (element suffix) → ununennium (“element 119”)”

OriginAncient Greek ἐννέα →
Ask AI about this wordChatGPTClaudePerplexityGoogle AIGrok

Meanings

prefix
  1. chemistryUsed for the digit nine to form systematic element names of elements whose existence has been predicted, and which have not yet been given a trivial name.

    un- (“1”) + un- (“1”) + enn- (“9”) + -ium (element suffix) → ununennium (“element 119”)

Origin

  1. Ancient Greekἐννέα“nine”
  2. Englishenn-

Reduced form of ennea-, from Ancient Greek ἐννέα (ennéa, “nine”).

More words from Ancient Greek

Full word history & related roots →
Cite this entry
APA

enn-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/enn-

MLA

“enn-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/enn-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “enn-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/enn-.

Source: enn- on Wiktionary, CC BY-SA 4.0.