Adverb
In a secret or covert manner.
In an illicit way, i.e. not permitted by the law or regulations.
Source: en.wiktionary.orgAfter a time he abandoned Phocaea, breaking the support agreement, and went clandestinely to Chios to found a school there, reciting Homer’s verses as his own. Source: Internet
Although officially restricted to a role of transmitting openly received information, they were soon being used to clandestinely gather confidential information and in some cases even to recruit spies and to operate de facto spy rings. Source: Internet
Between 1530 and 1540 Protestantism in Spain was still able to gain followers clandestinely, and in cities such as Seville and Valladolid adherents would secretly meet at private houses to pray and study the Bible. Source: Internet
Before their marriage, they often stayed clandestinely in a farmhouse called Wingstone in the village of Manaton on Dartmoor, Devon. citation From 1908 he took out a long lease on part of the building and made it their regular second home until 1923. Source: Internet
At the beginning of the war Biafra had 3,000 soldiers, but at the end of the war the soldiers totalled 30,000. citation There was no official support for the Biafran army by any other nation throughout the war, although arms were clandestinely acquired. Source: Internet
Chinese civilians buried alive during the 1937 Nanking Massacre The bitter struggle between the KMT and the CPC continued, openly or clandestinely, through the 14-year-long Japanese occupation of various parts of the country (1931–1945). Source: Internet