Hi there, I can explain what a lemma is in a way that you can easily understand like you are 5 years old.
A lemma is a special word that helps us understand all the different forms a word can take. Words can change their form by adding or removing letters or endings, and we need to have a special word that tells us what the basic form of a word is so we can understand all the different versions of it.
For example, let's say we have the word "run". We know that "run" can also be "ran" in the past tense, "running" in the present participle, or "runner" for someone who runs. But the basic form of the word, the lemma form, is "run".
So, a lemma is like the root word that all the different versions of the word come from. It helps us understand and analyze words in a way that makes it easier to learn and use them correctly.
I hope that makes sense! Let me know if you have any other questions.