yodan verb with 'su' ending (archaic), transitive verb
Archaic honorific verb used for a superior's knowledge. In modern Japanese, ご存知だ is the standard respectful equivalent.
帝はその事をしろしめしていた。
The emperor was aware of that matter.
yodan verb with 'su' ending (archaic), transitive verb
rule; reign over
Archaic honorific verb used for a sovereign's rule. Modern equivalents include 治める or 統治する.
神武天皇がこの国をしろしめしたと伝えられる。
It is said that Emperor Jimmu ruled this land.
Derived from 知る (shiru, 'to know') + しめす (shimesu, an archaic honorific auxiliary). The exact historical development is uncertain.