Several linguistics questions about the meaning in context of words:
How is called in linguistics the fact some words have a meaning only with other words?
How is it called when a word changes completely its meaning when another word is in the same sentence, and when it's just next to another word? And when it gains other meanings (that are not always in the dictionary)? And the meaning are the opposite?
A language, in general, has the ability to change words according to the context: Are all languages like this? How this property of the language is called?
Is this property a brake to the use of computer-made speech?
Is there name for all that concepts?