secret;  secrecy;  mystery;  secret (e.g. to success);  esoteric teachings
 strict;  close;  precise;  scrupulous
 secrecy;  highly classified information
 thick;  dense;  rich (as in taste or content);  crowded
 precise;  exact;  detailed;  accurate;  minute;  close
 privacy;  secrecy;  confidentiality
 private talk;  confidential talk;  secret talk
 minute;  detailed;  careful;  scrupulous;  thorough
 smuggling oneself into a country;  illegal immigration
 smuggling oneself into a country;  illegal immigration
 overcrowding;  crowded;  congestion
 detailed knowledge;  finely detailed
 poaching (fish or seafood)
 illicitly brewed liquor;  moonshine
 smuggling oneself out of a country
 scrupulous;  careful;  meticulous
 talking in whispers;  confidential words
 three Cs;  three conditions that facilitate the transmission of infectious diseases (closed spaces, crowds, and close contact);  three mysteries (Buddha's body, speech and mind)
 detailed drawing or picture
 smuggled goods;  contraband
 three Cs;  three conditions that facilitate the transmission of infectious diseases (closed spaces, crowds, and close contact)
 coarseness and fineness;  sparse or dense (growth)
 coarseness and fineness;  sparse or dense (growth)
 illicit traffic;  contraband
 three Cs;  three conditions that facilitate the transmission of infectious diseases (closed spaces, crowds, and close contact);  three mysteries (Buddha's body, speech and mind)
 three Cs;  three conditions that facilitate the transmission of infectious diseases (closed spaces, crowds, and close contact)
 cubic close packing;  cubic closest packing
 esoteric Buddhism of the Japanese Tendai sect