expression, godan verb (-ru)
get to work; start working
Used when someone begins a task or job, often after preparation or a pause.
朝食の後、すぐに仕事に掛かった。
After breakfast, I immediately got to work.
そろそろ仕事に掛かりましょう。
Let's get to work soon.
Standard kanji spelling for the expression.
Kana spelling of the verb part; common in everyday writing.
取り掛かる is a more general verb meaning 'to start (a task)', while 仕事に掛かる specifically means 'to get to work' and includes the noun 仕事.
Combination of 仕事 (work) + に (particle) + 掛かる (to start, to set about). The verb 掛かる here carries the meaning of beginning an action.