No, "prideful" is not a word with a prefix. It is an adjective formed from the noun "pride."
prideful
Prideful or Prideless
Germany's militarism was strong and prideful during World War 1.
prideful
no
proud, acomplishment, prideful.
This is not a Japanese word.
Japanese does not have a word for "it."
Abbi does not appear to be a Japanese word.
prideful
No it does not have a suffix