Grad= Step, Move

Question 1

Gradually

Answer 1

گام به گام و به تدریج

Grad= step, move

Question 2

Graduate from / in

Answer 2

فارق التحصیل شدن ( به نوعی ارتقا پیدا کردن یا یه گام به جلو برداشت )
Advance
Progress

someone who has completed a university degree, especially a first degree → undergraduate

Question 3

Degrade

Answer 3

تنزل دادن، گام به عقب برداشتن ، بدتر کردن
De ( down ) + grade 
Deteriorate 
Degenerate 
Decay 
Devalue 

to treat someone without respect and make them lose respect for themselves