支索 is read as しさく (shisaku) and means stay.
しさく
shisaku
しえん
support
しな
China
ししょう
obstacle
しほこう
(mine) timbering
しじりつ
approval rating
しえんたいせい
support system
しえんきん
financial support
しはいりつ
domination rate
しえんだんたい
support group
しえんひせいど
assistance funding system
しはいかぶ
controlling stock
しえんさく
support measures