Oh, dude, the word you're looking for is "torn." It's like when you accidentally rip your favorite shirt or when you try to open a bag of chips too enthusiastically. So, yeah, "torn" is your four-letter word that means ripped.
tore, torn
RIPPED!! Wait that's 6 letters. Well, not that!!
The 4-letter root word meaning against or opposite is "anti."
There are 4 phonemes in the word "ripped": /r/ /ɪ/ /p/ /t/.
pass
Dues
care
gnus
lazy
Guts
Able
left