If something is semicivilized, it is not completely civilized, but it is not completely wild either.
The word semicivilized can make people think of a place or a group of people that is not very modern or organized.
Examples:
The tribe was semicivilized, living in huts but also using some modern tools.
The island was semicivilized, with only a few small towns.
The semicivilized people had some rules, but not many.
The cat was semicivilized, using the litter box but also hunting for food.
In the forest, there is a semicivilized group of animals that sometimes trade with humans.
The semicivilized town had cars, but also horses for travel.