derelict (adj.) Look up derelict at Dictionary.com
1640s, from Latin derelictus "solitary, deserted," past participle of dereliquere "to abandon, forsake, desert," from de- "entirely" + relinquere "leave behind, forsake, abandon, give up," from re- "back" (see re-) + linquere "to leave," from PIE root *leikw- "to leave." Originally especially of vessels abandoned at sea or stranded on shore. As a noun, from 1660s.