debrief
UK[ˌdiːˈbriːf]US[ˌdiːˈbriːf]
v
To question someone in detail about a completed mission or undertaking.
v
To inform someone of the necessary information or instructions.
Morpheme Breakdown
de
brief
de
reverse
brief
inform
Etymology
The word "debrief" is a modern formation, originating in the mid-20th century within military and intelligence contexts. It is constructed by applying the reversing prefix "de-" to the verb "brief," which means to give concise preparatory instructions. The logic is elegant: to "brief" is to inform beforehand, while to "debrief" is to extract information afterward, effectively reversing the flow of information. Thus, the literal sense of "reverse the briefing" evolved into the specific abstract meaning of a post-event interrogation or report.
Analysis
Structure: de (reverse) + brief (inform)
de: A prefix from Latin, meaning "down from, off, reversing, undoing." In this word, it indicates a reversal or completion of the action.
brief: From Latin brevis (short), via Old French bref. It refers to a concise set of instructions or information. Here, it functions as the core root meaning "to inform or instruct."
Examples
The intelligence officer will debrief the agent upon her return.
After the simulation, the instructor gathered the team to debrief them on their performance.
The manager called a meeting to debrief the staff about the recent conference.