"exacting" in the verb sense

1. demand, exact

claim as due or just

"The bank demanded payment of the loan"

2. claim, take, exact

take as an undesirable consequence of some event or state of affairs

"the accident claimed three lives"

"The hard work took its toll on her"

"exacting" in the adjective sense

1. fastidious, exacting

having complicated nutritional requirements especially growing only in special artificial cultures

"fastidious microorganisms"

"certain highly specialized xerophytes are extremely exacting in their requirements"

2. stern, strict, exacting

severe and unremitting in making demands

"an exacting instructor"

"a stern disciplinarian"

"strict standards"

3. exigent, exacting

requiring precise accuracy

"an exacting job"

"became more exigent over his pronunciation"

Source: WordNet® (An amazing lexical database of English)

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