So I have been studying the meaning of the Hebrew word נַעַר. I understand that it's difficult to always find exact translations of certain words in the Hebrew vocabulary, but I have found in my search that the word generally means a young adult, child, or person who can already tell the difference between good and bad - a youngster.
In the Tanach, when the word נַעַר is used, sometimes it's (more or less) obvious what the young adult's age is. (See for instance Bereishit 21:17; we can see that Yishmael is no longer a toddler.)
But how can I tell what age range the word נַעַר covers, when no further information is given?