Sseetharee don't want to release Murgo. when I give him food he always says it is not enough. I always giver him four food which is max I can do. Or is it a way to use more than four trade slots?

Maybe I need to give him four specific type of food? I looked at the manual and on the Internet, and did not find any info about different types of satiation - depending on the food type.

I think any food will do. I just created a small heap of food with a spell and gave it to him.

As stated, each of the four trade slots can hold more than one unit of food, though each can only hold one type of food. Get a fishing rod, free up 10-20 stone of weight (dropping equipment near the lizardman as needed), and go catch fish at the river until you're holding 10-20 stone worth of fish. You can give it all to the lizardman in one stack.

The trade slots, like any other item slots, can each only hold a single type of item, but they can hold multiples of any items that are stackable. So a single slot can hold 20 torches (though their weight IS cumulative), but only one sword (swords aren't stackable).

Edit: If he takes the food you offer each time, then you might be able to meet his total by continuing to add and offer more. I haven't tried this (usually I just go fishing until I have a large stack of fish). If he doesn't take the food each time you offer, then it won't work.

4 pieces of meat and a loaf of bread are enough to satisfy Sseetharee.

OK guys. Thank you all for help. the food stacks. I gave him 10 fishes.