Necessary for a particular purpose or end.
He packed the requisite tools for the job. Without them, his plan to fix the leaky faucet would fail. Every single item had to be there for the repair to work.
The old lighthouse keeper knew the foghorn's steady blast was the requisite sound to keep the trawlers safe. Without its warning, lost ships would surely wreck on the jagged rocks, a fate no one wanted.
She finally had the requisite training hours. Years of studying the strange, glowing moss, learning its subtle shifts and its need for the specific lunar cycles, were now complete. This knowledge was the necessary key to understanding the deep hum of the planet.
To bake the most stupendous cake, the requisite ingredients are flour, sugar, and an alarming amount of sprinkles. Without these, your cake will be a sad, flat pancake of despair. Get the requisite stuff or face a flavorless future.
To successfully escape the giant, disco-ball-eyed badger, you'll need the requisite spork, a surprisingly sticky lollipop, and the ability to sing opera very loudly. Without these, your chances of survival are about as good as a penguin's on a unicycle.
She stared at the crumbling wall. To rebuild it, to make it safe again, she knew she needed more than just willpower. The proper tools and materials were the requisite things; without them, her efforts would be wasted, and her home would remain exposed.
Sarah gripped the rough hemp rope, her knuckles white. She needed every ounce of strength for this climb. The biting wind whipped at her face, but the upward pull was the requisite for reaching the sunlit plateau above.
The seasoned mycologist adjusted her magnifying loupe, a faint tremor in her hands. For this rare bioluminescent fungus, the exact humidity, temperature, and substrate composition were the requisite conditions for its delicate bloom, a spectacle she’d chased for years across mist-shrouded caverns.
Barnaby spent hours trying to assemble his new bookshelf, but he was missing the requisite allen wrench. Without it, the precarious pile of particleboard resembled a modern art installation more than furniture. His cat, Bartholomew, seemed to find the whole situation highly amusing, batting at a stray dowel with gleeful abandon.
To achieve the requisite level of glitter-encrusted absurdity for Bartholomew's one-man opera about sentient cheese, a veritable mountain of googly eyes and strategically placed disco balls was deemed essential. Without these key, absolutely necessary elements, the performance would have been tragically under-sparkled, a mere shadow of its cheesy destiny.
Finally, the rescue team had all the requisite supplies. With the storm worsening, every item was crucial for their survival. They wouldn't have made it through the night without each piece of equipment, especially the sturdy tent.
The old artisan, hands gnarled from a lifetime of intricate knotwork, knew the requisite tension for each strand of silkworm thread. Without that precise pressure, the delicate bioluminescent moss wouldn't adhere properly, and his sky-lantern creations would simply fall, unlit, into the perpetual twilight.
The flickering neon pulsed, casting a desperate glow on the grime. He gripped the battered datapad, sweat beading on his brow. Without the decryption key, the data would be useless, lost to the void. Obtaining it was the absolute requisite to even attempt recovery.
To achieve true slothfulness, the requisite elements are a plush couch, an endless supply of snacks, and the ability to delegate all chores to a subservient robot butler. Without these essential components, one might find themselves engaging in… *activity*.
Securing the requisite amount of pickled herring for Bartholomew's prize-winning badger wrestling team was proving an arduous, if pungent, endeavor. Without the fermented fish, the badgers' ferocious enthusiasm, a truly bizarre prerequisite for victory, simply wouldn't manifest, leaving Bartholomew's aspirations in a slippery, briny predicament.
The rescue party knew they had to have the requisite supplies; without them, their mission to save the stranded hikers was doomed. Every item, from the thermal blankets to the medical kits, was absolutely essential for their desperate endeavor to succeed, a palpable weight of responsibility settling on them.
The old surveyor, his hands gnarled like ancient roots, meticulously checked the astrolabe. Without the requisite precision, this monumental undertaking, charting the ephemeral phosphorescence of sub-arctic nebulae, would remain a futile exercise, a mere whisper against the cosmic void.
The bioluminescent fungi needed to be precisely calibrated; their faint luminescence was the requisite signal for the deep-sea expedition's sonar array. Without this exact glow, the submersible would have remained blind, unable to navigate the treacherous abyssal plains, jeopardizing the entire research objective.
To finally ascend to the coveted position of Supreme Overlord of all Toast, one must first procure the requisite ceremonial butter knife, a gilded implement purportedly forged by cherubic artisans. Without this crucial, albeit ostentatious, utensil, your reign would be naught but a crumbly, butter-less tragedy.
To truly master the esoteric art of competitive cloud-gazing, one must possess the requisite mental fortitude to distinguish cumulus from cirrus, not just aesthetically, but with rigorous meteorological precision. An encyclopedic knowledge of atmospheric phenomena, coupled with an unwavering, almost fanatical, dedication to skyward scrutiny, forms the absolute bedrock for this rarefied pursuit.
Normal — Everyday words worth reinforcing.