伺

to wait on

to watch / to wait / to examine / to spy

"person" radical in Chinese characters (Kangxi radical 9)

surname Si

to take charge of / to manage / department (under a ministry)

to serve / to wait upon

to wait for an opportunity / to watch for one's chance

servo (small electric motor) / computer server

to spy upon / to lie in wait for (an opportunity)

(coll.) hard to please / high-maintenance

server (computer) (Tw)

to wait for the opportunity

lit. to look for holes, and observe gaps (idiom) / fig. to search out one's opponent's weak points / to look for the Achilles' heel