Strong
Weak
- Insurmountable
The challenges ahead felt insurmountable without proper support. - Arduous
The trek through the mountains was arduous and exhausting. - Daunting
The idea of public speaking can be daunting for many people. - Formidable
The opponent in the chess match was formidable and skilled. - Challenging
The exam was particularly challenging this year. - Complex
The math problem was too complex for most students to solve. - Demanding
Climbing the cliff was a demanding task for the team. - Strenuous
The workout routine is quite strenuous for beginners. - Laborious
The process of creating the sculpture was laborious and required patience. - Tough
The training program is tough but rewarding.