This is the 628th most frequent Arabic word.
الطفل
The child.
Here, "الطفل" refers to a singular male child as the subject of the sentence, denoting who is participating in the action of playing.
يلعب الطفل بالكرة.
The child plays with the ball.
In this sentence, "طفل" is the singular form used to refer to someone's child and is linked with a possessive suffix "ها" indicating 'her' ownership.
طفلها ذكي للغاية.
Her child is very intelligent.
Here "الطفل" emphasizes the general concept of a singular child requiring care, possibly referring to a specific child or children generically.