What does "معرفة" and "ذهاب" mean in arabic?
I have seen words similar to them, but i get very confused when i see the prefix م in front of the word عرف. or other words. I dont understand what the prefix م mean in arabic, in front of the verb. The same with this word محتاج (need) but when its م in front i get lost from what the meaning of the word means.
and the verb ذهاب, why is the ا in there? What is it for? and in what way does it form the sentence.

past tense- Knew عرف
-I know اعرف
Male- you know تعرف
Female- you know تعرفي\تعرفين
Plural- you know تعرفو\تعرفون
---------------------------------------------------------
I am know(ing)- انا بعرف
when i put the (ING) the prefix in arabic would be ب in front of the verb right?

and here is the link i got some of the words from: http://arabic.desert-sky.net/verbs.html

Question

What does "معرفة"  and "ذهاب" mean in arabic?
I have seen words similar to them, but i get very confused when i see the prefix م in front of the word عرف. or other words. I dont understand what the prefix  م mean in arabic, in front of the verb. The same with this word محتاج (need) but when its م  in front i get lost from what the meaning of the word means.
and the verb ذهاب, why is the ا in there? What is it for? and in what way does it form the sentence.

past tense- Knew عرف
-I know اعرف
Male- you know تعرف
Female- you know تعرفي\تعرفين
Plural- you know تعرفو\تعرفون
---------------------------------------------------------
I am know(ing)- انا بعرف
when i put the (ING) the prefix in arabic would be ب in front of the verb right?

and here is the link i got some of the words from: http://arabic.desert-sky.net/verbs.html

Answer

ذهاب is going somewhere, it's like when you say: Going to a party is amazing.
معرفة  means knowledge - awareness - knowing something.

Answer

hello , i hope this answers your questions 
1. when you add م to the verb the word become noun example : انا احتاج i need , and قابلت رجل محتاج  i met a man in need (poor) 
2. the same with عرف and معرفه  , معرفه means knowledge example ,مع القراءه تزداد المعرفه with reading knowledge increase . 
3. ذهاب like going and its noun also   example : like this plane ticket is two way , هذه التذكره ذهاب و عوده  
4. i know : انا اعرف , i am knowing  : انا اعرف also , because we have only present tense in Arabic so it will be the same meaning with or without (ing)