IPA: /ˈpriːtʃmənt/
KK: /ˈpriːtʃmənt/
A long and often boring speech that tries to teach a moral lesson or give advice.
The teacher's preachment about honesty felt unnecessary to the students.
Preachment is formed from "preach" (from Old French *precher*, meaning to proclaim or announce) and "-ment" (a suffix used to form nouns indicating an action or resulting state). The word refers to the act of proclaiming or announcing a message, often in a religious context.
Think of someone 'proclaiming' a message ('preach') and the '-ment' indicating the action of doing so. This helps you remember that 'preachment' is the act of proclaiming a message.