rockwheel

名词 n.

英文释义

名词 n.
  1. A toothed wheel used to excavate trenches.

词形变化

rockwheels plural

词源

Etymology tree
Medieval Latin roccabor.?
Old English *rocc
Early Medieval Latin rocca
Anglo-Norman roquebor.
Middle English rokke
English rock
Proto-Indo-European *kʷel-
Proto-Indo-European *kʷekʷléh₂
Proto-Germanic *hweulō
Old English hwēol
Middle English whel
English wheel
English rockwheel
From rock + wheel.
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