This is the 486th most frequent Persian word.
کودک
Child.
The word "کودکی" is used in its abstract form to refer to the period of being a child, describing the nature of this time in the individual's life.
کودکی او پر از ماجراجویی بود.
His childhood was full of adventures.
The word "کودک" here serves as the subject of the sentence, referring to a young person participating in the activity of playing.
کودک در پارک بازی میکند.
The child is playing in the park.
The plural form "کودکان" is used here to indicate the general audience of the book, highlighting the intended recipients.