köken: /takimat͡su/ → /taĩmat͡su/ → /taimat͡su/ Shift by イ音便 (i onbin, “i sound shift”) from takimatsu, itself from 焚き (taki, “burning”, stem or continuative form of verb 焚く (taku), "to burn") + 松 (matsu, “pine tree”). Compare the development of 続松 (tsugimatsu → tsuimatsu) of the same meaning. Orthographic borrowing from Chinese 松明 (sōngmíng).