Since autos means self and kratos means power and these two roots are what the word "autocrat" is based on, with this knowledge it can be determined that an "autocrat" is someone who rules over themself or others.
Another way to look at it is "self in power" as in "myself in power", one person in power. Kratos also means strength so it is also safe to assume that this person would hold great power over other people without struggle or outside influence.
Some other words that use these greek roots are:
- Autonomy: "autos" meaning self and "nomos" meaning law or rule.
- Democracy: "demos" meaning people and "kratos" meaning rule or power.
- Aristocracy
- Theocracy
Let me know if this helped and if you need anymore help! :)