to work for many hours
長時間働く (chojikan hataraku)
"He’s been putting in long hours to finish the report."
"彼は報告書を仕上げるために長時間働いている。" (kare wa hokokusho o shiageru tame ni chojikan hataraite iru)
Everyone in the group works together for the common good.
to understand the hidden meaning behind something
To retire someone or something from active use.
to secure something so it cannot change
to be in charge of or control something
to react too quickly or nervously to a problem
