Definition of 地下工作 (ちかこうさく)
ちかこうさく
                        地下工作
ちかこうさく
chikakousaku
noun
•
        
underground activities, secret maneuvering(yojijukugo)
Related Kanji
| 地 | ground, earth | 
| 下 | below, down, descend, give, low, inferior | 
| 工 | craft, construction, katakana e radical (no. 48) | 
| 作 | make, production, prepare, build |