Re-reading word lists feels productive, but it's one of the least efficacious study methods. The technique that actually locks vocabulary into long-term memory is active recall — testing yourself before looking at the answer.
Here's the difference: passive review means reading "ubiquitous — present everywhere" and nodding. Active recall means covering the definition and asking yourself, "What does ubiquitous mean?" That moment of mental effort — even if you struggle — is where learning happens.
The Retrieval Practice guide recommends the "cover and recall" method: look at the word, cover the definition, try to recall it, then check. Words that remain elusive go back into your active study pile.
The reason this works is straightforward — retrieval practice strengthens neural pathways. Each time you successfully pull a definition from memory, the connection gets stronger. Each time you fail, you create a productive struggle that makes the correct answer stick when you finally see it.
To reiterate: don't just read your flashcards passively. Quiz yourself. Say the definition out loud. Write it down from memory. The more effort retrieval takes, the stronger the memory becomes.
This is exactly why vocabulary matters on test day — the GRE, SAT, and TOEFL don't let you browse word lists. They demand instant recall under time pressure. Practice that way, and test day feels familiar.