demanding

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

requiring more than usually expected or thought due;
especially great patience and effort and skill (Freq. 4)
- found the job very demanding
- a baby can be so demanding
• Ant:
undemanding
• Similar to:
exigent, exacting, hard-to-please, hard to please, needy,
rigorous, stringent, tight, stern, strict
• See Also:
difficult, hard