井桁

Japanese
Kanji in this term
井 桁
い
Grade: 4		 けた > げた
Grade: S
kun’yomi
井桁: the wooden frame around the wellhead is the igeta.
井桁: the igeta shape of crossed beams in the ceiling of the US Library of Congress.
井桁: the Igeta family crest.

Etymology

Compound of 井 (i, “well, as in a water source”) +‎ 桁 (keta, “beam, girder”), from the way that four stout wooden beams would be crossed to form the top of a wellhead, similar in shape to a tic-tac-toe board.

The keta changes to geta as an instance of rendaku (連濁).

Pronunciation

Noun

井(い)桁(げた) • (igeta) ←ゐげた (wigeta)?

  1. a puteal: a wellhead for a water well, traditionally consisting of a wooden enclosure framed along the top, and possibly bottom, with stout wooden beams crossed at the ends
  2. the symbols #, ＃, or ♯
  3. a pattern similar to the symbol #, such as the shape of the crossed beams on a beam or coffered ceiling
  4. a kind of 家紋 (kamon, “family seal”) featuring such a symbol
  5. the number four in the argot of fishmongers
    Possibly from the way that the character 井 has four strokes, and the way that 桁 (keta) also means digit.
  6. an advanced remodelling technique for the chassis of a miniature four-wheel-drive racing model, consisting of a reinforcement similar in shape to a traditional Japanese wellhead

Proper noun

井(い)桁(げた) • (Igeta) ←ゐげた (wigeta)?

  1. a surname

References
  1. Matsumura, Akira, editor (2006), 大辞林 [Daijirin] (in Japanese), Third edition, Tōkyō: Sanseidō, →ISBN
  2. NHK Broadcasting Culture Research Institute, editor (1998), NHK日本語発音アクセント辞典 [NHK Japanese Pronunciation Accent Dictionary] (in Japanese), Tōkyō: NHK Publishing, →ISBN
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