"De-briefs" generally refers to a formal meeting to discuss a mission or situation in detail. The antonyms for this word could be "neglects" or "ignores." If someone neglects to conduct a debriefing, they are failing to communicate important information and insights that could help others learn and improve. Similarly, if someone ignores the need for a debriefing, they are likely missing out on key opportunities to gather feedback and make meaningful changes. Other potential antonyms for de-briefs might include terms like "withholds," "conceals," or "obfuscates," which all involve acts of holding back or obscuring relevant information.