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全力を尽くして作業を成し遂げる / 持ち上げるなどのタスクを完遂するために力を振り絞る / できる限り精一杯努力して仕事に取り組む

英語の意味

to exert oneself to the fullest in order to finish some task (such as lifting an object)

Hann þurfti að hafa sig allan við til að klára verkefnið fyrir frestinn.

彼は締め切り前にプロジェクトを終わらせるために全力を尽くさなければならなかった。

He had to do his utmost to finish the project before the deadline.