The syntax-semantics interface is like putting together a puzzle piece with words in a sentence. When you speak or write, you have to make sure that the words you use make sense and have the right meaning.
The syntax part is the way you put words together in a sentence so that it sounds right. It's like putting together a puzzle piece using different shapes to create a picture. Just like puzzle pieces, words have to fit together in a sentence in a certain order to make sense.
The semantics part is the meaning of the words in your sentence. It's like the picture that's created when you finally put all the puzzle pieces together. Each word has its own meaning, and when you put all the words together in the right order, it creates a message that others can understand.
So, the syntax-semantics interface is the way that the puzzle pieces of words, shapes, and meanings all fit together to create a sentence. Just like how you can only create a beautiful picture with the right puzzle pieces, you can only create a clear message with the right combination of words and their meanings.