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atrophy

/ˈætrəfi//ˈætrəfi/·verb, noun
to waste away through disuse or lack of nourishment; the wasting itself
Fig. 1 — Two legs rise on tiptoe together, and the calves answer together — round, equal, certain.
01Definition

To atrophy is to waste away for want of use: Greek a- 'without' plus trophē 'nourishment' — starved, not attacked. Muscles atrophy inside a cast; a language atrophies when nobody speaks it to you; committees, town centres and friendships atrophy when the traffic through them stops. The word is its own noun — muscle atrophy is the clinical term — and its special claim is the cause built into it: nothing needs to go wrong except nothing happening.

02In use
  • iMuscles atrophy surprisingly fast when a limb is kept in a cast.
  • iiWithout daily practice, her French began to atrophy.
  • iiiThe committee atrophied into a body that met twice a year and decided nothing.
03Collocations
  • muscles atrophy
  • atrophy from disuse
  • skills atrophy
  • muscle atrophy
  • slowly atrophying

Family atrophy (noun) · atrophied (adjective)

04Relations

=waste away, wither, deteriorate, weaken, shrivel

≠strengthen, develop, flourish

06TOEFL & IELTS

Biology first — unused muscle atrophies, and medicine writes muscle atrophy as a noun — but the exams reward the transfer: skills, languages, institutions and civic habits atrophy when unused, a precise upgrade on 'get worse' because the cause (disuse) is named inside the verb. Greek roots make it stick: a- 'without' + trophē 'nourishment'. Its opposite in the gym is hypertrophy, growth from overuse. And do not let the ending pull you to entropy — a physics word from a different family altogether.

07Asked
What is the opposite of atrophy?
Hypertrophy — growth from overuse, the mirror image of wasting from disuse. In the gym, muscle hypertrophies under load and atrophies in a cast; the two Greek prefixes tell the story, hyper- 'over' against a- 'without', both fixed to trophē, 'nourishment'. For the figurative senses, strengthen, develop and flourish are the everyday opposites when a skill or an institution comes back to life.
What is the difference between atrophy and entropy?
They rhyme and end alike, but their tails come from different Greek words. Atrophy's -trophy is trophē, 'nourishment' — wasting from lack of use, always of something living or organised. Entropy's -tropy is tropē, 'a turning' — the physicist's measure of disorder, at home in thermodynamics, not biology. A muscle atrophies; a closed system's entropy rises. Only one of them belongs in a sentence about the body.
Can skills atrophy?
Yes — and it is one of the word's busiest modern uses. A language you never speak, a proof technique you never practise, a sense of direction outsourced to a map app: all atrophy from disuse, on the same logic as the booted calf in the scene above, flattening week by week while its neighbour keeps rising. Writers now warn of skill atrophy when routine thinking is handed to automation — the muscle unused is the muscle lost.
Is atrophy a verb or a noun?
Both, and the noun came first: English used 'an atrophy' from around 1600 and only pressed it into service as a verb in the mid-1800s. Today the verb (muscles atrophy) and the noun (muscle atrophy) are equally standard, and atrophied does duty as the adjective — an atrophied limb, atrophied instincts. Whichever you reach for, the built-in cause stays the same: not enough use.
What are the types of muscle atrophy?
Medical writing generally distinguishes three, useful vocabulary for reading passages: physiologic atrophy, from simple disuse and often reversible with exercise; pathologic atrophy, from disease, ageing or starvation; and neurogenic atrophy, from damage to the nerve feeding the muscle, which tends to be more sudden. The common thread is the word's own logic — the muscle stops being asked to work.
How do you pronounce atrophy?
AT-ruh-fee, /ˈætrəfi/ — three syllables, stress on the first, the same short a as in 'cat'. Despite the spelling it has nothing to do with a trophy: that word opens with a long 'oh' and comes from a different root entirely. The adjective atrophied keeps the stress in the same place: AT-ruh-feed.