Na
来自Big Physics
Safin（讨论 | 贡献）2022年4月26日 (二) 23:36的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/na ref] From [https://en.wikipedia.org/wiki/Middle_English Middle English] na, from [http…”的新页面）
wiktionary
From Middle English na, from Old English nā, from Old English ne(“not”) + ā(“ever”). More at no.
Development of Etymology 1, above; compare nah.
Abbreviations.
etymonline
Na
chemical symbol for sodium, from Latin natrium (see sodium).
