留一手

to hold back a trick / not to divulge all one's trade secrets

old variant of 留[liu2]

to leave (a message etc) / to retain / to stay / to remain / to keep / to preserve

old variant of 留[liu2]

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

a skill / mastery of a trade / by oneself / without outside help

hand / (formal) to hold / person engaged in certain types of work / person skilled in certain types of work / personal(ly) / convenient / classifier for skill / CL:雙|双[shuang1],隻|只[zhi1]