No, absolute humidity is the exact amount of water vapor in the atmosphere. So, if the water vapor in the air remains unchanged, so does the absolute humidity.

Absolute humidity refers to the amount of water vapor that exists in a given volume of air at a given time. Relative humidity is absolute humidity relative to the maximum humidity for the current temperature.

There is no such thing as a sygrometer, but a hygrometer is a device that is used to measure the humidity of the air. It can indicate relative humidity or absolute humidity.

A device used to measure humidity is called a psychrometer or hygrometer.

By marriage.

Humidity and temperature are related. The maximum absolute humidity increases with temperature and pressure (up to the boiling point).