The August 2026 SAT Vocab Survey + Quiz - Int Version

With the help of reports from Reddit's r/SAT, I've compiled the most common and challenging vocabulary from the August 2026 SAT — pulling from both the US and International administrations. I've put these into a quiz format so students and parents can challenge themselves. Good luck!

This round covers 11 new words that hadn't shown up in my earlier official-SAT packages:

precipitation · assuage · supplement · reconcile · abstruse · complicate · habituate · regale · tentative · nominal · imbue

A few words from August were repeats — words that have appeared on earlier official SATs and that I've already built into other quizzes. Those can be found for the August US quiz here: https://www.mrjohnstestprep.com/the-august-2026-sat-vocab-survey-quiz-us-version/

idiosyncratic · belie · heterogeneous · incongruous · anomalous · detrimental · exacerbate · rectify · portentous

SAT Vocabulary August 2026 Official SAT - Warm-up Reading Passage

Instructions: Read this passage carefully before taking your quiz. All 11 vocabulary words from the August 2026 US and International SATs appear in context. Pay attention to how each word is used naturally in the story.

Night Shift at Cerro Alto

Marcus Delgado climbed the last switchback to the dome at four in the afternoon, which gave him three hours before dark and roughly ninety minutes before the forecast turned. Weather models had put a band of precipitation over the ridge by nine, and rain on a mountaintop observatory is not a delay, it is a cancellation. He had driven six hours for a four-hour window.

Waiting for him at the door was Ana, a first-year graduate student on her first observing run, and she was already convinced she had ruined something. She had misread the pointing log and slewed the telescope past its soft limit that morning. Marcus spent ten minutes trying to assuage a panic that was, by any reasonable measure, out of proportion to the mistake. Everyone slews past a limit. The interlock exists precisely because everyone does it.

The observing plan was straightforward on paper. Cerro Alto's own detector array would not produce enough signal on a target this faint, so the run was designed to supplement those measurements with archival photographic plates from the 1950s, scanned and reprocessed by a group in Chile. Two instruments, seventy years apart, pointed at the same patch of sky. The difficulty was that nobody had yet managed to reconcile the old plate photometry with the modern calibration, and the two datasets disagreed by an amount that was small, stubborn, and completely unexplained.

The correction that supposedly bridged them was published in 1974 and was, in Marcus's opinion, genuinely abstruse — four pages of notation with no worked example, written by someone who clearly assumed his readers already agreed with him. Ana had read it twice and understood none of it, which she took as further evidence of her own inadequacy rather than of anything wrong with the paper.

Cloud cover at seven o'clock complicated everything further. Thin cirrus does not stop you from observing; it just makes every measurement slightly untrustworthy in a way that is difficult to quantify afterward. They pushed the start time back, killed the interior lights, and waited in the dark while their eyes habituated to it. It takes about twenty minutes. Nobody who has done it more than a few times still finds it uncomfortable.

In that twenty minutes Marcus regaled her with the worst observing run of his career: a 1998 trip to Kitt Peak where the dome shutter froze half-open, the backup generator failed, and he came home after nine nights with two usable frames. He told it as a comedy. It had not been one at the time. Ana laughed for the first time all day.

They got two and a half hours before the rain arrived. It was enough for a tentative result — a number worth writing down, not a number worth publishing, and Marcus was careful to say so out loud twice. Ana had been given the nominal title of co-investigator on the proposal, a courtesy that usually means nothing at all, and she would now be defending real data at the group meeting on Thursday.

Driving down at two in the morning, Marcus thought about what the night had actually accomplished. Not the measurement. The measurement was provisional and would probably be superseded. What mattered was that eight hours in a cold dome had begun to imbue a nervous first-year with the one habit the work demands: the willingness to write down a number you are not yet sure of, and then go find out.

Words practiced: precipitation · assuage · supplement · reconcile · abstruse · complicate · habituate · regale · tentative · nominal · imbue