Of the 73 causes of Leg numbness that we have listed, we have the following prevalence/incidence information: 1  4 causes are very common diseases. 2  3 causes are common diseases. 3  0 causes are uncommon diseases.  0 causes are rare 1  diseases. 8 causes are very rare diseases.  66 causes have no prevalence information.
clandestine - conducted with or marked by hidden aims or methods; clandestine intelligence operations; cloak-and-dagger activities behind enemy lines; hole-and-corner intrigue; secret missions; a secret agent; secret sales of arms; surreptitious mobilization of troops; an undercover investigation; underground resistance.
Espionage (colloquially, spying) is the obtaining of secret or confidential information without the permission of the holder of the information. Spies help agencies uncover secret information. Any individual or spy ring (a cooperating group of spies), in the service of a government, company or independent operation, can commit espionage. The practice is clandestine, as it is by definition unwelcome and in many cases illegal and punishable by law.