This is the 5486th most frequent Japanese word.
うるさく
Noisy; annoying; bothersome.
The word "うるさく" is used here to describe a noisy environment that affects concentration.
うるさくて勉強に集中できません。
It's too noisy, so I can't focus on studying.
"うるさく" describes someone's pestering or overly pushy behavior.
彼はうるさく指示を出し続けます。
He persistently gives directions in an annoying manner.
"うるさく" describes the manner in which the children were playing.