Officiate

google

ref

mid 17th century: from medieval Latin officiare ‘perform divine service’, from officium (see office).

wiktionary

ref

Circa 17th century, from Latin officiātus, perfect passive participle of officiō(“conduct or perform religious services”), from Latin officium(“official duty, service”).

etymonline

ref

officiate (v.)

"to perform the duty of a priest," 1630s, from Medieval Latin officiatus, present participle of officiare "perform religious services," from Latin officium "a service" (in Medieval Latin, "church service"); see office. The earlier verb in English was simply office (mid-15c.). Related: Officiated; officiating.