Word: furtively (adverb)

Source Sentence: Teenagers in school uniforms play games on fancy smartphones while some passengers nod off as warm air wafts from the heater. Young ladies look furtively at mirrors to fix their makeup, and Japanese tourists stare curiously at an advertisement featuring two contrasting pictures of a woman before and after plastic surgery. Self-appointed preachers, peddlers of cheap goods and inconsiderate passengers watching TV with the volume up loud sometimes raise the eyebrows of commuters. (http://www.koreaherald.com/view.php?ud=20131115000823)

English Definition: Furtiveness is the practice of hiding information from certain individuals or groups, perhaps while sharing it with other individuals. That which is kept hidden is known as the secret. Furtiveness is often controversial, depending on the content of the secret, the group or people keeping the secret, and the motivation for furtiveness. Furtiveness by government entities is often decried as excessive or in promotion of poor operation; excessive revelation of information on individuals can conflict with virtues of privacy and confidentiality. It is often contrasted with social Transparency.

Synonyms / Antonyms: secrecy, clandestinity

Korean Definition: 몰래, 살그머니, 슬쩍

Personal Sentence: He looked at her answer sheet furtively over her shoulder.