What term describes the creation of new lexical items in pidgin languages through the expansion of an existing word’s meaning?

The creation of new lexical items in pidgin languages through the expansion of an existing word’s meaning is described as semantic extension. Semantic extension, also known as semantic broadening or semantic shift, involves taking a word that already exists in the pidgin and extending its meaning to cover new concepts or situations that are related to the original meaning. This process allows the pidgin to create new vocabulary without having to borrow or invent entirely new words. For example, a word originally meaning 'see' might extend its meaning to also mean 'understand', because there is a conceptual link between visual perception and comprehension. This allows the pidgin to express a wider range of meanings using a limited set of words.