post isとは意味・読み方・使い方

From either:

Proto-Italic *porstis, from Proto-Indo-European *pr̥-sth₂-i-s (“standing forth”), from *pró +‎ *steh₂- (“to stand”) +‎ *-is;
or Proto-Italic *postis, from Proto-Indo-European *h₂pó-sth₂-i-s (“standing upright”), from *h₂pó +‎ *steh₂- (“to stand”) +‎ *-is.

postis m (genitive postis); third declension

post, doorpost, doorjamb

tenēre postem ― to consecrate a temple, or other edifices
(by extension, chiefly in the plural) a door

Third-declension noun (i-stem, ablative singular in -e or occasionally -ī).

Gallo-Romance:
- Northern:
  - Old French: post
    - Middle French: post
      - French: pôt (dialectal)
      - ⇒ Middle French: poteaul, postiau
        
        French: poteau
- Southern:
  - Catalan: post
  - Occitan: pòst
Ibero-Romance:
- Asturian: poste
- Galician: poste
- Portuguese: poste
  - → Hunsrik: Poste
- Spanish: poste
  - → Cebuano: poste
  - → Tagalog: poste
Borrowings:
- → Proto-West Germanic: *post (see there for further descendants)
- → Welsh: post

^ De Vaan, Michiel (2008), “postis”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 484