Cleaning (noun)

1. The act or process of removing dirt, dust, or impurities from something.
2. The act or process of making something clean, tidy, or free from dirt.
3. The act of making something free from harmful or unwanted substances.

Origin:

The word 'cleaning' comes from the old english 'clænan' meaning 'to make clean.'.

Examples:

1. She did a thorough cleaning of the house before the guests arrived.
2. The cleaning crew was responsible for keeping the office building spotless.
3. The cleaning of the river was a major environmental project.
4. The cleaning of the old painting revealed its original beauty.
5. Regular cleaning is necessary to maintain the health and hygiene of the surroundings.