lemmatize - definition and synonyms

verb [transitive] linguistics 

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/ˈlemətaɪz/
present tense
I/you/we/theylemmatize
he/she/itlemmatizes
present participlelemmatizing
past tenselemmatized
past participlelemmatized
  1. to reduce different forms of a word back to their base form, the lemma, for example 'breaking' or 'broke' back to 'break'