むずい

(1)not easy; requiring great physical or mental effort to accomplish or comprehend or endure; "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"

(2)簡単でない

(3)完成させ、理解しまたは我慢する物理的または精神的努力を必要とする

(1)a difficult task

(2)難しい仕事

(3)nesting places on the cliffs are difficult of access

(4)崖の営巣地は近づくのが難しい

(5)difficult times

(6)困難な時

(7)why is it so hard for you to keep a secret?

(8)なぜ秘密を守るのがそんなに難しいのか？