ultraslow
Extremely drawn out
Ultraslow means extremely slow, emphasizing a pace far below normal or expected speed.
The prefix intensifies slowness: ultraslow motion video, ultraslow internet speeds.
Scientific contexts use it for phenomena occurring over vast timescales: ultraslow spreading ridges in geology, ultraslow brain waves in neuroscience.
Of frozen rivers
- creepingMoving slowly, stealthily
- crawlingMoving on hands, knees
- ploddingMoving slowly, heavily
- snail-likeMoving extremely slowly
tortoise-like · dawdling · inching · lagging · sluggish · poky · lumbering · meandering
Slow and inactive
- lethargicLacking energy or alertness
- torpidInactive and slow
- drowsyNearly falling asleep
- listlessLacking energy or enthusiasm
languid · somnolent · slothful · indolent · enervated · phlegmatic · sleepy · dreamy
Proceeding by small additions
- progressiveFavoring reform and innovation
- evolutionaryPertaining to gradual biological change
- phasedIntroduced or removed incrementally
- stepwiseProceeding by degrees
piecemeal · methodical · continuous · subtle · imperceptible · accumulating · building · unfolding
Extended beyond normal duration
- drawn-outExtended beyond normal duration
- lengthyOf excessive duration
- interminableWithout apparent conclusion
- extendedLengthened in time or space
endless · long-winded · lingering · sustained · unending · never-ending · marathon · time-consuming
glacial
Of frozen rivers
snail-like · tortoise-like · dawdling · inching · lagging · sluggish · poky · lumbering · meandering · inchmeal
sluggish
Slow and inactive
listless · languid · somnolent · slothful · indolent · enervated · phlegmatic · sleepy · dreamy · comatose
incremental
Proceeding by small additions
- progressiveFavoring reform and innovation
- evolutionaryPertaining to gradual biological change
- phasedIntroduced or removed incrementally
stepwise · piecemeal · methodical · continuous · subtle · imperceptible · accumulating · building · unfolding · developing
protracted
Extended beyond normal duration
- drawn-outExtended beyond normal duration
- lengthyOf excessive duration
- interminableWithout apparent conclusion
extended · endless · long-winded · lingering · sustained · unending · never-ending · marathon · time-consuming · laborious
ultraslowultrafast
Extremely rapid
lightning-fast · lightning · supersonic · blistering · breakneck
slow, slowly, slowness, slower, slowdown, slowpoke, slowest, ultramarine, ultraviolet