an abstract place usually conceived as having depth | a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations |
a subpopulation divided into a stratified sampling | a member of the ninja who were trained in martial arts and hired for espionage or sabotage or assassinations; a person skilled in ninjutsu |
people having the same social, economic, or educational status | |
one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) | |