kaluptō, kruptō, I conceal: apo-calypse, eu-calyptus, crypt.
kaustos, burnt; kautērion, a branding: caustic, cautery, cauterize.
kīneō, I move; kīnētikos, for moving: kinetics, kinematics.
kosmos, order, ornament, universe: cosmetic, cosmic, cosmo-gony.
krateō, am strong, rule: auto-crat, demo-cracy, aristo-crat.
kri-, to separate; krisis, a separating, deciding: crisis, critic.
kuklos, wheel: cycle, cyclic, cyclone.
Lab-, take; lēpsis, a taking: syl-lable, epi-lepsy, cataleptic.
legō, I pick out, say; lexis, speech; logos, discourse, reason: ec-lectic (ek, out of), lexi-con, dialect, logic.
leipō (lĭp-), I leave: el-lipsis, ec-lipse.