Mercury conjunct Saturn
The following aspect interpretations apply only to natal or birth charts. Please see Synastry aspects for comparison charts, and Interpreting transits for transit aspects.
When Saturn conjuncts Mercury we have the principle of caution, pessimism and responsibility eclipsing the ability to think, speak and learn. This can result in learning or speaking disabilities if Saturn is much stronger than Mercury, but more likely it will express itself in a very disciplined and structured mental process. Innovation is not especially welcome by these people, they usually prefer traditional methods. They can be a little overbearing and narrow minded, therefore it would be best for these people to learn to respect the ideas of others and become more flexible.