Ask the dumb question. Pretending you know is way more expensive.

Eight seconds of looking uninformed is the entire price, and you pay it once. Nodding along costs you the rest of the unit, the project built on the part you missed, and the exam where it finally surfaces anyway. There is almost always somebody else in the room quietly hoping you ask.

Ask one thing out loud this week that you assume everyone else already understands. Keep it short and specific, with no apology in front of it. Nobody remembers the question by Friday, and you get the answer for good.