Lemmatization is a linguistics term that means grouping together words with the same root, or lemma, but with different inflections or derivatives of meaning, so that they can be analyzed as one item. The aim is to take away the inflectional suffixes and prefixes to bring out the word’s dictionary form. 

For example, to lemmatize the words cats, cat’s, and cats’ means taking away the suffixes s, ‘s, and s’ to bring out the root word ‘cat’. Lemmatization is used in training robots to speak and converse, making it important in the field of Artificial Intelligence called natural language processing or natural language understanding.

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