"Chastiser" Natural Recordings by Native Speakers
A chastiser is a person who scolds or condemns someone for a wrongdoing or misbehavior.
To chasten something means to improve or raise its quality by correcting or disciplining it. It can also mean to temper or season something, like metal, to make it stronger or more suitable for use.
The word "chastest" is the superlative form of the adjective "chaste". A chaste person is someone who is morally upright, virtuous, and free from impurity or corruption. This word is often used to describe someone who is faithful to their partner, retaining their modesty and avoiding indecent or improper behavior.
The word "chastening" means (a) to discipline or correct somebody, especially by punishment; or (b) to make somebody feel ashamed or sorry for something they have done.