Too slight or gradual to be noticed.
The crack in the foundation grew larger each day, but it was so tiny, so slow, that at first, it was imperceptible. Then, the water started to leak, a little at first, then more, until the whole room was damp.
The faint hum of the bio-luminescent fungi on the cave walls was an imperceptible shift at first, a change so gradual the explorer barely registered it. Then, the walls began to glow brighter, a slow dawn in the deep, making the shadows retreat inch by careful inch.
The old lighthouse keeper watched the tide. He’d seen it change for fifty years, but this shift was different. The water level dropped so slowly, it was imperceptible, yet a new sandbar, unseen before, was slowly emerging, cutting off the path to the small fishing boat.
My cat, Mittens, started purring so quietly, it was almost imperceptible, like a whisper of dust bunnies. Then, in a blur, she stole my entire sandwich, a stealth mission so smooth I didn't even notice until the last crumb vanished.
My pet rock, Bartholomew, was an expert at blending in. He’d shift position while I wasn’t looking, a movement so slight, so gradual, it was imperceptible. I swear one day he winked, but it was probably just a dust mote. He’s a master of subtle rock-based espionage.
He watched the sand shift, a slow, imperceptible creep of erosion that had eaten away at the cliff face over years. He felt a cold dread, a fear he couldn't quite name, as the ground beneath him grew smaller.
He traced the faint line on the ancient ceramic shard. The wear was so subtle, so gradual, it was almost imperceptible. Decades of handling, perhaps by hands long gone, had smoothed the surface to a softness that felt impossibly distant, a silent history felt only in the ghost of touch.
He felt the tremor in his hand, an imperceptible shift that had been growing for weeks. Just a slight shaking at first, then a more pronounced tremor, a signal that something was changing, something he couldn't quite stop.
My cat, Bartholomew, claims he's been on a strict diet, yet his belly grew so large, it was imperceptible to him. He attributed the expansion to "strategic napping" and a "slight redistribution of fluff." I think he just ate the entire bag of tuna flavored treats.
Barnaby the badger, renowned for his interpretive dance skills, practiced his new routine involving interpretive cheese-grating. The subtle shift in his hindquarters, too slight to be noticed by the untrained eye, was crucial to conveying the anguish of a cheddar facing a particularly aggressive grater.
A cold dread began to settle in his stomach, an imperceptible shift that grew into a suffocating wave of panic. He tried to shake it off, telling himself it was nothing, but the feeling deepened, a silent certainty of impending doom.
The old automaton's joints began to seize. Each minute movement became a tiny struggle, an imperceptible grinding that only the observant technician, attuned to its whirring heart, could detect. Soon, the entire contraption would halt, a quiet surrender.
The frost crept across the observatory dome, an imperceptible change at first, until the stark white blanket obscured the stars he'd charted for decades. He felt a hollow ache, a quiet despair settling in as the familiar celestial map vanished.
The ninja's stealth was legendary; his presence was so imperceptible, even the dust bunnies organized a search party. He once rearranged an entire banquet hall while everyone was mid-chew, leaving guests bewildered by the sudden surplus of tiny decorative flags.
My pet rock, Bartholomew, began his transformation into a miniature nebula so gradually, so subtly, that it was truly imperceptible. One moment he was a stoic chunk of granite, the next, a faint, shimmering haze of cosmic dust and existential ennui, accompanied by the faint scent of burnt toast.
He watched the hairline fracture spread across the glass, so imperceptible at first, a mere whisper of weakness. Then, with a sickening crunch, it spiderwebbed, a testament to the insidious, unnoticed degradation that had truly shattered his world.
The subtle shift in atmospheric pressure, a minuscule variance in geomagnetic flux, was imperceptible to the crew. Yet, Elias felt a prickle of unease, a gnawing intuition that something fundamental was about to recalibrate across the celestial cartography of their mission.
The faint scent of ozone, an imperceptible alteration in the stagnant air of the abandoned observatory, presaged the approaching ion storm. A shiver traced its way down Anya’s spine, a primal dread she couldn't articulate, as the faint hum from the derelict equipment intensified.
Bartholomew, a connoisseur of fine cheeses and artisanal socks, noticed an imperceptible shift in his cat's affection. It began as a subtle diminuendo in head-butts, then a vanishing of purrs, until Bartholomew suspected his feline overlord was meticulously planning his dethronement, one silent nap at a time.
Barnaby's toupee, a masterpiece of auburn synthetic hair, experienced a glacial drift across his scalp, imperceptible to the casual observer. Yet, his discerning feline companion, a creature of profound olfactory acumen, detected the subtle olfactory migration with every twitch of its proboscis, judging Barnaby's follicular pilferage with quiet, whiskered disdain.
Advanced — Less frequent words that stretch an upper-level vocabulary.