Han character 遉

It has a Chinese spying sense and several Japanese readings.

In Chinese, 遉 is an old variant of 偵, whose senses include spying, reconnaissance, and detective work. In Japanese, it can be read うかがう (“to inquire or investigate”) or さぐる (“to probe”); it is also an uncommon spelling of さすが (“as expected” or “even so”). Its earliest attestation is in a late Western Zhou inscription on the bronze vessel 無叀鼎. There, the graph is read as 貞 in a royal appointment record naming a “tiger official” and describing the front and side directions. That inscriptional reading is distinct from the later Chinese connection to 偵 and spying.

When does 遉 mean Japanese さすが?

In Japanese, 遉 is an uncommon spelling of さすが.

Japanese さすが and さすがに can mean “as expected” or “even so”; さすがの can also single out someone impressive, even as an exception. The ending matters: 遉に works adverbially, while 遉の introduces the person or thing being judged.