— dull; immature
Jejune means dull and uninteresting, or naive and simplistic in a way that reveals immaturity. It can describe ideas, speeches, writing, or people that lack substance, depth, or sophistication.
A jejune argument is disappointingly shallow. A jejune performance is flat and uninspiring. The word carries a note of intellectual disappointment — the expectation was higher, but what was delivered was simplistic and childish. Originally, jejune also meant "lacking nourishment" (from its Latin root), and that sense of emptiness still echoes in the modern meaning: something jejune leaves you intellectually hungry.

Answer a question to start building your vocabulary.
JAY JUNE
The keyword JAY JUNE comes from how Jejune sounds when spoken aloud. This pronunciation connection makes it easy to recall the keyword whenever you hear or see the word.
Memory Link
JAY in JUNE gave the most boring speech—it was dull and immature for his age!
Picture JAY standing up in JUNE to give a speech at a summer gathering — and it is painfully dull, immature, and shallow for someone his age. Visualise the audience yawning, checking their phones, exchanging looks of boredom as Jay drones on with the most simplistic, uninteresting points. That flat, childish emptiness — all surface, no substance — is jejune.

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 jejunus, meaning "fasting" or "empty" (literally, "on an empty stomach"). The word entered English in the 17th century first meaning "lacking nourishment," then evolved to mean "lacking intellectual substance" — dull, shallow, and uninteresting. The connection is vivid: just as an empty stomach leaves you unsatisfied, jejune ideas leave the mind unfed.
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