What is the process called by which a word's meaning changes from one usage to another in pidgin development?

The process by which a word's meaning changes from one usage to another in pidgin development is called semantic extension (or semantic shift). Semantic extension occurs when the meaning of a word broadens to encompass new, related meanings or contexts that were not part of its original meaning. This is a common way for pidgins to expand their vocabulary without creating entirely new words. For example, a word that originally meant 'see' might extend to mean 'understand', reflecting a conceptual connection between visual perception and comprehension. The original meaning doesn't necessarily disappear, but the word gains additional meanings through semantic extension.