Noisy or boisterous; loud and bustling, making it hard to be calm or quiet.
夜中に通りが騒がしくてよく眠れなかった。
The street was noisy at night and I couldn't sleep well.
このカフェは学生が多くていつも騒がしい。
This café is always noisy because it has many students.
子供たちの声で教室が騒がしかった。
The classroom was noisy with the children's voices.
Turbulent or troubled (era, situation); unsettled, marked by disturbance or unrest.
あの時代は政治的に騒がしかった。
That era was politically turbulent.
会社では最近、再編の噂で社内が騒がしい。
There's been a lot of unrest at the company lately due to rumors of reorganization.
彼の心は悩みで騒がしく、夜も眠れなかった。
His mind was troubled and restless with worries, and he couldn't sleep at night.