Unskilled means not skilled or not well-trained. Someone who is unskilled is not very good at something.
To flip is to turn something upside down. When you flip a coin, you're trying to see which side is going to come up again.
Teller is a word that is used to describe someone who works at a bank or a store. Teller is also used to describe someone who works at a casino, or who sells tickets to events.
Disruptions are things that stop working or cause a problem. They can be small, like a light going out, or they can be bigger, like a riot.
Cheaply is used to describe something that is not expensive, but is not also quality. Cheaply made products are often not very durable or reliable.
The seminal is the source of something's power or influence. It is the moment when something starts to have an effect.