When the ruler of the seventh house is in the tenth house, this means that your spouse or a long-term partner may be prominent people.
They may, for example, be well-known for what they do, hold an influential position in their company, or they can be very talented and this talent is noticed by the world. Your partner can be a high-achiever, and they are likely to have succeeded in life from early on.
This placement can also mean that your other half will be your advisor, someone that you look up to. They may be a very important part of your life, maybe even the most important. Your relationship may be fated, or your partner may be involved in fateful events in your personal life.
The ruler of the seventh house in the tenth house can mean that your partner is in some way similar to one of your parents, likely to be your father. If this placement is afflicted, your other half may be strict and controlling, or focused on name and fame, whilst other things are not that important for them.
With an afflicted combination, your partner may be workaholic, or they may be surface people, very much trying to impress the world, but not working on the faults that they have which manifest in the family life.
The very same descriptions can also apply to your business partner, and such descriptions may apply to your best friend, too.
Another meaning of the seventh house lord in the tenth house is that your enemies are strong. If this combination is stronger than your Ascendant, it means your enemies are stronger than you.
Your public opponents may hold the positions of prominence, and it’s best not to get involved in any direct confrontation with them, as this can cause a career fall, problems at work, or some public scandal. It’s best to resolve your disagreements as peacefully as possible.
This placement also means that there will be rivals in your career. When you want to achieve something, others will have the same goal, and you may need to compete for a promotion or greater acknowledgment.
There could also be people jealous of your success at work and publicly trying to block your progress.
On a positive note, if this combination is not afflicted, you are likely to make lifelong friends at work who can be influential and intelligent people, giving excellent advice for your life, especially about your career.