circumflex: a diacritical mark (^) placed above a vowel in some languages to indicate a special phonetic quality
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
methylenedioxymethamphetamine: a stimulant drug that is chemically related to mescaline and amphetamine and is used illicitly for its euphoric and hallucinogenic effects; it was formerly used in psychotherapy but in 1985 it was declared illegal in the United States