Troublesome, annoying, or bothersome; something that requires effort, attention, or causes annoyance (procedures, relationships, etc.).
引っ越しの手続きが多くて本当に煩わしい。
There are so many procedures for moving that it's really bothersome.
彼は人付き合いが煩わしいと言って、外出を控えている。
He says socializing is annoying, so he refrains from going out.
煩わしい電話を避けるために、通知をオフにした。
I turned off notifications to avoid annoying calls.
書類の確認が煩わしく感じるなら、チェックリストを作るといい。
If checking documents feels tedious, it's good to make a checklist.