His movements were mechanical, as if devoid of emotion.

My major is mechanical engineering.

His illness has completely vanished.

His pain completely vanished.

After the nuclear accident in Fukushima, decontamination work is being carried out.

They are working hard to decontaminate the radioactive contaminated area.

This room has high humidity, so we need to use a dehumidifier.

The humidity in this room is high, so let's dehumidify it using a dehumidifier.

In this zoo, feces removal work is carried out every day.

She removes hair from her legs every week.