Definition of 地下活動 (ちかかつどう)
ちかかつどう
                        地下活動
ちかかつどう
chikakatsudou
noun
•
        
underground activity, underground activities, underground movement
Related Kanji
| 地 | ground, earth | 
| 下 | below, down, descend, give, low, inferior | 
| 活 | lively, resuscitation, being helped, living | 
| 動 | move, motion, change, confusion, shift, shake |