This is the 2865th most frequent Japanese word.
すぐさま
Immediately; at once.
Here, すぐさま ('immediately') is used to describe an action that occurs without delay after a preceding event.
彼はすぐさま部屋から出て行った。
He immediately left the room.
In this sentence, すぐさま ('immediately') emphasizes the instant nature of potential agreement with the proposal.
その提案にすぐさま賛成することが難しい。
It is difficult to immediately agree with that proposal.
Here, すぐさま ('promptly') is used to denote quick response time in addressing the error for continuation of production.