Final answer:
A slogan is a short, memorable phrase used to simplify complex ideas and unite a group around a common message, which was evident during the colonial resistance against British rule.
Step-by-step explanation:
The word that describes a short, easily understood saying used by a group to express their beliefs or to get their point across is most accurately referred to as a slogan.
This kind of phrase is often used for simplifying complex ideas or principles into a memorable and catchy phrase that can be easily communicated. During the conflict between the colonists and the king of England, such slogans played a significant role in uniting the colonists and expressing their discontent with British rule.