exacting

[ig-zak-ting]
adjective
1.
rigid or severe in demands or requirements: an exacting teacher.
2.
requiring close application or attention: an exacting task.
3.
given to or characterized by exaction; extortionate.

Origin:
1575–85; exact + -ing2

exactingly, adverb
exactingness, noun
nonexacting, adjective
nonexactingly, adverb
nonexactingness, noun
overexacting, adjective
superexacting, adjective
unexacting, adjective
Dictionary.com Unabridged

exact

[ig-zakt]
adjective
1.
strictly accurate or correct: an exact likeness; an exact description.
2.
precise, as opposed to approximate: the exact sum; the exact date.
3.
admitting of no deviation, as laws or discipline; strict or rigorous.
4.
capable of the greatest precision: exact instruments.
5.
characterized by or using strict accuracy: an exact thinker.
6.
Mathematics. (of a differential equation) noting that the collection of all terms, equated to zero, is an exact differential.
verb (used with object)
7.
to call for, demand, or require: to exact respect from one's children.
8.
to force or compel the payment, yielding, or performance of: to exact money; to exact tribute from a conquered people.

Origin:
1400–50; late Middle English exacten (v.) < Latin exāctus (past participle of exigere drive out, thrust out), equivalent to ex- ex-1 + ag(ere) to drive + -tus past participle suffix

exactable, adjective
exacter, exactor, noun
exactness, noun
nonexactable, adjective
preexact, adjective, verb (used with object)
quasi-exact, adjective
quasi-exactly, adverb
unexacted, adjective


3. rigid, severe, unbending. 5. methodical, careful, punctilious, demanding, scrupulous. 8. wring. See extract.


1, 2. imprecise.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To exacting
Collins
World English Dictionary
exact (ɪɡˈzækt)
 
adj
1.  correct in every detail; strictly accurate: an exact copy
2.  precise, as opposed to approximate; neither more nor less: the exact sum
3.  (prenominal) specific; particular: this exact spot
4.  operating with very great precision: exact instruments
5.  allowing no deviation from a standard; rigorous; strict: an exact mind
6.  based mainly on measurement and the formulation of laws, as opposed to description and classification: physics is an exact science
 
vb
7.  to force or compel (payment or performance); extort: to exact tribute
8.  to demand as a right; insist upon: to exact respect from one's employees
9.  to call for or require: this work exacts careful effort
 
[C16: from Latin exactus driven out, from exigere to drive forth, from agere to drive]
 
ex'actable
 
adj
 
ex'actness
 
n
 
ex'actor
 
n
 
ex'acter
 
n

exacting (ɪɡˈzæktɪŋ)
 
adj
making rigorous or excessive demands: an exacting job
 
ex'actingly
 
adv
 
ex'actingness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

exact
"precise, rigorous, accurate," 1530s, from L. exactus, pp. of exigere, lit. "to drive or force out," also "demand, finish, measure," from ex- "out" + agere "drive, lead, act" (see act). The verb (late 14c., implied in exaction) is older in English and represents the literal
sense of the Latin. Related: Exacted.

exacting
"too demanding," 1580s, prp. adj. from exact.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
He was known as a demanding and exacting newsman and anchor.
Widespread hunger remains intractable throughout the world and is exacting a
  high human toll.
Philosophical leanings might seem impossible to pin town with exacting word
  problems.
Although exacting in their requirements, forms offered by specialists are among
  the choicest of rock garden plants.
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