This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. break or cause to break into pieces

"However, this led Bigdogdotcom to suspect that there is a plan to fragmentise and decentralise IJN as a prequel to a takeover."

break    separate    come apart    split up    fall apart   

crunch    comminute    bray    crush    atomise    splinter    mash    grind    grate    rag   

fragmenting    fragmentize    fragments