Instigate (verb) To set an action or conflict in motion, especially one that stirs up trouble.
Example: Investigators believed a rival gang had instigated the warehouse fire to scare off the competition.
Mnemonic: Picture someone using a long stick to poke a hornet's nest — to instigate is to jab at a situation until it erupts.
Intractable (adjective) So difficult to manage or resolve that ordinary efforts simply fail against it.
Example: The negotiators faced an intractable dispute over water rights that had outlasted three previous treaties.
Mnemonic: 'In-' (not) plus 'tractable' (able to be pulled or steered, like a tractor) — an intractable problem can't be steered into line.
Intrepid (adjective) Showing fearless resolve when facing danger or difficulty.
Example: The intrepid climbers pushed on toward the summit even as storm clouds rolled in.
Mnemonic: Think of someone whose nerve never 'trips' — an intrepid explorer keeps a steady step no matter what's ahead.
Intricate (adjective) Made up of many finely detailed parts that fit together in a complicated way.
Example: The watchmaker used tiny tweezers to assemble the intricate network of gears inside the clock.
Mnemonic: Picture a maze full of tricky little turns hidden inside the word — intricate designs are packed with tricky details.
Inundate (verb) To overwhelm someone or something with a huge, sudden amount.
Example: After the recipe went viral, the small bakery was inundated with online orders it could never fill in time.
Mnemonic: Shares a root with 'undulate' (wave motion) — to inundate is to hit someone with wave after wave until they're submerged.
Inveterate (adjective) Settled into a habit so long-standing that it has become part of someone's basic character.
Example: Her grandfather was an inveterate storyteller who could turn a trip to the mailbox into a twenty-minute saga.
Mnemonic: Contains 'veteran' — an inveterate habit is one you've been a veteran of for years.
Invigorate (verb) To fill someone with fresh energy and enthusiasm.
Example: A brisk walk in the cold morning air always seems to invigorate her before a big exam.
Mnemonic: 'In-' plus 'vigor' (energy) — to invigorate is to pump vigor straight into someone.
Irascible (adjective) Easily provoked to anger; quick-tempered.
Example: The irascible chef screamed at anyone who touched his knives.
Mnemonic: Shares a root with 'ire' (anger) — an irascible person is one spark away from an angry outburst.
Irrevocable (adjective) Impossible to change or take back once it has already been done.
Example: Signing the contract was an irrevocable decision that neither side could undo, no matter how much they later regretted it.
Mnemonic: 'Ir-' (not) plus 'revocable' (able to be called back) — an irrevocable choice can never be revoked.
Jubilant (adjective) Overflowing with triumphant joy after a success.
Example: The jubilant team hoisted the championship trophy overhead as confetti rained from the ceiling.
Mnemonic: Shares a root with 'jubilee,' a joyful celebration — jubilant crowds act like every day is a jubilee.
Judicious (adjective) Showing sound, sensible judgment, especially in practical decisions.
Example: A judicious investor spreads risk across several different assets.
Mnemonic: Shares a root with 'judge' and 'judgment' — a judicious person weighs decisions the way a wise judge weighs a case.
Juxtapose (verb) To place two things side by side so that their differences or similarities become clear.
Example: The exhibit juxtaposed photos of the city from 1920 and today to show how much had changed.
Mnemonic: Latin 'juxta' means 'next to' — to juxtapose is literally to set things next to each other for comparison.
Kindle (verb) To start a fire, or figuratively to stir up a feeling or interest that grows stronger over time.
Example: A single documentary about coral reefs was enough to kindle her lifelong passion for marine biology.
Mnemonic: Picture striking a match to kindle a campfire — the same little spark can kindle curiosity in a person.
Lament (verb) To express deep sorrow or regret, often openly, about a loss or disappointment.
Example: The old fisherman would lament the disappearance of the salmon that once filled the river every spring.
Mnemonic: Think of a lament as a sad song set to a slow 'moment' — a lament is basically a melody of mourning.
Languid (adjective) Slow-moving and relaxed, lacking energy or urgency.
Example: They spent a languid afternoon drifting down the river with no destination in mind.
Mnemonic: Shares a root with 'languish' (Latin 'languere,' to grow weak) — a languid mood carries that same slow, drained-out energy.
Latent (adjective) Present but hidden or undeveloped, not yet showing itself.
Example: The test revealed a latent talent for music that she had never had the chance to explore.
Mnemonic: From Latin 'latere,' to lie hidden — latent qualities are lying in wait just beneath the surface.
Lethargic (adjective) Sluggish and lacking energy, often due to tiredness or illness.
Example: The heavy lunch left everyone feeling lethargic through the afternoon meeting.
Mnemonic: Comes from 'lethargy' — picture the mythical river Lethe, whose waters were said to cause a drowsy, forgetful haze.
Loquacious (adjective) Very talkative, often to an excessive degree.
Example: The loquacious tour guide narrated every building we passed in exhausting detail.
Mnemonic: From Latin 'loqui,' to speak (also found in 'eloquent' and 'colloquial') — loquacious people just keep on speaking.
Lucid (adjective) Clear and easy to understand; also, clear-headed and coherent in thought.
Example: Even in her nineties, my grandmother gave a lucid account of events from decades earlier.
Mnemonic: From Latin 'lux,' light — lucid thinking or writing lets light shine straight through, with nothing murky in the way.
Lucrative (adjective) Generating a substantial amount of profit or financial gain.
Example: The teenager's lawn-mowing business turned surprisingly lucrative once he added three new neighborhoods.
Mnemonic: Shares a root with 'lucre,' an old word for money — lucrative ventures are dripping with lucre.
Ludicrous (adjective) So absurd or unreasonable that it seems almost laughable.
Example: It was ludicrous to expect the whole class to finish the project in a single night.
Mnemonic: Picture something so silly it triggers ludicrous laughter — the word practically contains the giggle itself.
Magnanimous (adjective) Generously forgiving or noble-spirited, especially toward a rival or someone with less power.
Example: The winning coach was magnanimous in victory, praising the losing team's effort.
Mnemonic: Latin 'magnus' (great) plus 'animus' (spirit) — a magnanimous person has a great, big-hearted spirit.
Malleable (adjective) Easily shaped, bent, or influenced.
Example: Gold is prized by jewelers because it is so malleable that it can be hammered into thin sheets.
Mnemonic: From Latin 'malleus,' hammer — malleable material can be hammered into a new shape without breaking.
Meager (adjective) Small in amount and insufficient for what is actually needed.
Example: The meager rations left each hiker with barely enough food to last the final two days of the trail.
Mnemonic: It rhymes with 'eager' but describes the opposite of plenty — an eager appetite meets a meager plate.
Melancholy (adjective) Filled with a thoughtful, lingering sadness.
Example: A melancholy mood settled over the graduates as they said goodbye to classrooms they had known for four years.
Mnemonic: Ancient physicians blamed sadness on 'black bile' ('melan-' = black, '-choly' = bile) — melancholy still carries that old sense of a dark, heavy mood.