— to break out again; to recur
Recrudesce means to break out or become active again after a period of inactivity or dormancy. It is most commonly used to describe diseases, conflicts, or problems that return after appearing to have subsided or healed.
The word carries a distinctly negative connotation — things that recrudesce are unwelcome returns. A disease that recrudesces was thought to be cured; a conflict that recrudesces was believed to be resolved. The word captures the frustration and danger of something harmful coming back when you least expect it.

Answer a question to start building your vocabulary.
RE-CREW-DrESS
The keyword RE-CREW-DrESS comes from how Recrudesce sounds when spoken aloud. This pronunciation connection makes it easy to recall the keyword whenever you hear or see the word.
Memory Link
The pirate CREW had to RE-DRESS their wounds all over again — the old battle scars broke out again and recurred, just when they thought they had healed!
Picture a pirate CREW who had finally DRESSed their battle wounds and thought they were healed — only for the old scars to RE-open and break out all over again, forcing them to RE-DRESS everything from scratch. RE-CREW-DrESS gives you the keyword, and the image of wounds that were thought healed suddenly breaking out again captures the meaning of recrudesce perfectly. Visualise the pirates groaning as blood seeps through their fresh bandages — the problem has returned.

There are 3 steps to effectively memorising vocabulary.
Step 1: Derive a keyword from the word based on how the word is spelled or pronounced. Next time you see the word, you will be able to derive the keyword from it because it is based on the word.
Step 2: Form a visual memory link that connects the keyword and the meaning(s) of the word you are learning.
Step 3: Ensure to Visualise the image, see it in your imagination. This is important even if it takes a few seconds.

From Latin recrudescere, meaning "to become raw again," from re- (again) + crudescere (to become hard or raw), derived from crudus (raw, bleeding). The word vividly evokes a wound that reopens — something that was healing becoming raw and painful once more.
The mnemonic visualisation above helps you learn this word instantly — no rote memorisation needed. But to move it into long-term memory, you still need to review it a few times.
This is where spaced repetition comes in — it shows you words right before you're about to forget them, so you spend less time reviewing and remember more. After just a few spaced reviews, you'll start recalling the meaning naturally — without even needing the keyword or memory link.

You've learned this word using our mnemonic system — but to truly lock it into long-term memory, you need to review it at the right time. That's where spaced repetition comes in.
Our built-in spaced repetition system shows you words just before you're about to forget them, so you review less and remember more. After a few reviews, you'll recall the meaning naturally — without even needing the keyword or memory link.

You can explore the Word List for a pack from the dashboard. Once you have selected a pack, just clicks Words

Visualising the memory link is the most important step — it's what makes you remember the word on the very first try. Don't just read the memory link. Close your eyes and see it play out in your imagination.
The more vivid and detailed your mental image, the stronger the memory. Every word on VocabularyFast comes with a visualisation audio guide. Just look at the image, hit play, and follow the audio as it walks you through the scene.
This takes only a few seconds but makes all the difference between forgetting a word tomorrow and remembering it for life.

Quizzes are the fastest way to check if you've truly learned a word. Pick from two modes — see the word and recall the meaning, or see the meaning and recall the word.
Both directions strengthen your memory in different ways. Each quiz is 10 questions, so it only takes a minute or two. Take a quiz anytime to quickly spot which words need more review.

Words in each pack are organized into smaller, meaningful groups — not random lists. Each group contains words that share a theme, difficulty level, or frequency of appearance.
This lets you focus your learning on the words that matter most, rather than jumping between unrelated words. Start with the most commonly tested words and work your way through each group at your own pace.

Ready to boost your vocabulary?
Build Vocabulary Now