This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Third-person singular simple present indicative form of preexist.

"In a recent thread a link pointed to an argument made by Peter Williams that a mind preexists the development of a brain."

preexisted    preexisting    preexists   

exist    be   

preëxisted    preëxisting    preexistent    preexistence   

Liszt    assist    cist    coexist    consist