Here's how it breaks down in the words you mentioned:
* Sociable: This refers to being friendly, outgoing, and enjoying the company of others. It emphasizes the aspect of being a good companion.
* Social: This word relates to society, interactions between people, and the way people live together. It focuses on the concept of living and interacting as a group of companions.
* Sociology: The study of society and social relationships. It delves deeper into understanding how people behave and interact as a collective of companions.
So, the core meaning of "socius" as "companion" or "ally" is the foundation for these words, highlighting the importance of human connection and interaction in all three.