| Definition/Meaning | Word/Phrase |
|---|---|
| covert operation not attributable to the organization carrying it out | black operation |
| ultra-leftist militant group founded in 1957 from the breakup of the Japanese Communist Party; includes a covert action wing | Chukaku-Ha |
| state of being covert and hidden | covertness , hiddenness |
| (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation) | neutralisation , neutralization |