LAWAN KATANYA ADALAH :
- Difficult = requiring a lot of effort, energy, or skill to accomplish (memerlukan usaha, energi, atau kemampuan untuk menyelesaikannya).
- Hard = difficult to do, understand or answer (sulit dikerjakan, dipahami, atau dijawab)
- Challenging = difficult in an interesting way that tests your ability (Sulit, yang menguji kemampuanmu).