zuānyán

to study meticulously / to delve into

zuànshí

diamond / CL:[[顆|颗<kē>]]

zuān

to drill / to bore / to get into / to make one's way into / to enter (a hole) / to thread one's way through / to study intensively / to dig into / to curry favor for personal gain

zuàn

an auger / diamond

zuàntóu

drill bit

zuānjìn

to get into / to dig into (studies, job etc) / to squeeze into

diànzuàn

electric drill

kāizuān

to start drilling

zuānxīnchóng

boring insect / snout moth's larva (Aphomia gullaris or Plodia interpuncuella or Heliothus armigera etc), major agricultural pest

zuānxīn

to sneak in / to infiltrate / to be piercingly painful / to be unbearable (of pain, itch etc)