插不上手

to be unable to intervene

no; not so / (bound form) not; un-

used in 上聲|上声[shang3 sheng1]

(bound form) up; upper; above; previous / first (of multiple parts) / to climb; to get onto; to go up / to attend (class or university) / (directional complement) up / (noun suffix) on; above

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]

to insert / stick in / pierce / to take part in / to interfere / to interpose

old variant of 插[cha1]

to obtain / to master / overhand (serve etc) / seat of honor