busy; occupied; hectic
restless; hurried; fidgety
「忙しい」 has another reading with different meanings.
busy; hectic; frantic
今週はずっと忙しくて休めなかった。
I was busy all week and couldn't rest.
忙しい中、来てくれてありがとう。
Thank you for coming despite being busy.
年末は毎年忙しくなるから今のうちに準備する。
Year-end gets busy every year so I prepare while I can.