サシ

from 刺し, nominal form of 刺す

サシ or さし • (sashi) 

1. the uniformly fatten of meat, especially beef.

   牛肉にサシが入る

   ぎゅうにくにさしがはいる

   gyūniku ni sashi ga hairu

   The beef gets uniformly fattened.

• 霜降り肉 (しもふりにく, しもふりにく): marble beef

From the Old Korean word for castle, a descendant form of which appeared in Middle Korean texts as jas (잣). Possibly also related to the Ainu word chashi (チャシ) meaning "fence; enclosure; castle; fortress."

サシ or さし • (sashi) 

1. 城: (archaic) Castle.
   • 720: Nihon Shoki

     東韓者、甘羅城・高難城・爾林城是也。

   • 720: Nihon Shoki

     逮乎朕之王天下、投身對馬之外、竄跡匝羅之表、阻高麗之貢、呑百濟之城。

• Archaic.

• Sakamoto, Tarō; Saburō Ienaga, Mitsusada Inoue, Susumu Ōno (1965) Nihon Shoki (Iwanami Nihon Koten Bungaku Jiten) (in Japanese), Iwanami Shoten, →ISBN