He's an elderly gentleman.

他是位年长的绅士。

youdao

He is an elderly gentleman, silver-haired, with a twinkle in his eyes.

他是位上了年纪的绅士，满头银发，双目炯炯有神。

youdao

"Rougi, " as she's affectionately known, came to the U.S. in 2009 to care for an elderly gentleman.

WSJ: Ralph Gardner Jr: The City's African Heart

Sure enough, an elderly gentleman in pinstriped trousers and tailored jacket whisked Nossel's bags up to his room.

FORBES

Suddenly, I felt a tap on my shoulder as an elderly gentleman gestured towards my guidebook and a non-signposted village road.

BBC: Forgotten landscapes outside Krakow