demanding

demand (something) of (someone or something)

To insist that someone or something do, provide, or relinquish something. I demand the full attention of my students, so if you plan to nap or socialize in here, then you might as well drop this class right now. You're really demanding a lot of our washer by throwing such a big load in there.
See also: demand, of
Farlex Dictionary of Idioms.

*tough on someone

severe and demanding in dealing with someone. (*Typically: act ~; be ~; become ~; get~.) My boss is very tough on me, but I need the structure and discipline.
See also: on, tough
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (someone or something) promises well
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • (have) got something going (with someone)
  • a straw will show which way the wind blows
  • accompanied by
  • accompanied by (someone or something)
  • accompany
  • a crack at (someone or something)
  • all right
References in periodicals archive
This might be due to the fact that the students here are more interested in the respective contents than regular students; highly demanding lessons might then satisfy this interest and compensate for any inconvenience highly demanding tasks may create.
Gifted students' perception of special courses. (On-going Topics)
The Applegates had one year to fix the price by demanding payment.
Farmers get favorable ruling on price-later contracts
"We also believe that the demonstrated safety performance of Alcoa's aluminum structures will be very important in helping Ferrari satisfy Europe's demanding safety requirements."
Elementary economics: slumping industrial production and demand from China is pinching aluminum scrap supply
Many customers demand sustainable forestry and should require all suppliers to meet the same demanding standards for forest management and paper manufacture.
Where will paper be made in the future? Emerging trends are challenging the U.S. paper industry's global leadership in paper and board production. The industry can revitalize itself through better trade policy, marketing, branding, enhanced cost competitiveness, and other strategies
The entrepreneurial classes are demanding new, cost-cutting, efficiency-enhancing technologies as soon as these are shown to be posible and before benchmarks for their potential supply can be established.
Intel Meets Alan Greenspan
Such a policy will result in continued support from an increasingly demanding citizenry that will continue to scrutinize any controversial police action.
Negotiation concepts for commanders