Went Undercover is a term used to describe when someone hides their identity and infiltrates a certain group or organization in order to gain information. The term can be broken down into three words: HID (3 letters), SLEPT (5 letters) and SPIED (5 letters). HID means to conceal oneself from view, SLEPT means to rest in a bed or other place of repose and SPIED means to observe secretly. Therefore, Went Undercover can be summarized as someone who conceals themselves, rests in a place of repose and observes secretly in order to gain information.