unprotected

adjective
un·​pro·​tect·​ed | \ ˌən-prə-ˈtek-təd How to pronounce unprotected (audio) \

Definition of unprotected

1 : lacking protection or defense unprotected troops skin unprotected from the sun's rays
2 : performed without the use of birth control to prevent pregnancy also : performed without the use of a condom to prevent spread of sexually transmitted disease unprotected sex