The spelling of the word "ecstasied" refers to a state of ecstatic bliss or joy. The word is pronounced /ɛkˈsteɪzid/, with the first syllable being pronounced like "ek", the second syllable pronounced like "stay", and the final syllable pronounced like "zid". The "ie" at the end of the word is used to signify the past tense of the verb "ecstasy" and is pronounced like "eyed". While not a commonly used word, it can be useful to know for those interested in poetry or literature.
Enraptured; filled with extreme delight.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.