how is arabic 'hadhaa' made up? meaning hadha= this is?

if u want to learn a new language try not to look deeply into it..just take it as it is.

and "hadhaa" as u typed it means this is , hadhaa used when u r pointing out to something that is masculine, or a male.

hadihi" means this is also,,but it is used when u r pointing out to something feminine , or a female

Example:

hadhaa Omar( male) means this is Omar.

hadhaa hisaan. means this is a hourse

hadihi Laila( female)means this is Laila.

hadihi safina. means this is a ship

Straightforward identification of noun based on whether it is feminine or male.