Purify
An antonym for purify is to pollute, or adulterate.
The Sanskrit word for "cleanse" is "शुद्धि" (śuddhi).
"Cleanse" is to purify or make totally clean in the religious sense.
Disinfect
The word "cleanse" is in the King James Version of the Bible 33 times. It is in 32 verses.
Nancy needed to go to the spa to cleanse her mind.
hunter, scrounge, or scrounger Examples of a scavenger are magpies, hyenas, rats, and vultures
The sink was covered in all sorts of grime and mold and I felt that it needed to be cleansed thoroughly.
bathe, wash, clean,
Cleanse is the odd word because it is not about "cutting off" something.
Cleanse, purify, refine, decoct, extract
There are many different types of weight loss cleanses a person can use and the completion time varies for each. For example, the Master Cleanse is a 30 day cleanse program. Another example is a 3 day Juice Cleanse. The duration just depends on what cleanse a person is participating in.