kernel

n.果核，果仁，核心

keep...in mind, keep/hold pace with, keeper, keeping, keepsake, keg, keg beer, kelp, kelvin, ken, kennel, kepi, kept, kept woman, kerb (also esp US curb), kerb drill, kerb-crawling, kerbstone, kerchief, kerfuffle, kerosene, kerosene, kerosine (also kerosine), kestrel, ketch, ketchup, kettle, kettledrum, key, key (also cay), key money, key signature, key-pad, key-ring, keyboard, keyhole, keynote, keystone, KG, KGB, khaki,