officiate

verbs

act in an official capacity in a ceremony or religious ritual, such as a wedding
"Who officiated at your wedding?"
officiate
is derived from
officiation
is derived from
office
is derived from
office
is derived from
officiant
is a type of (narrower)
perform a function
"Who will perform the wedding?"
perform
perform duties attached to a particular office or place or function
"His wife officiated as his private secretary"
function, officiate
is derived from
officiation
is derived from
officiation
is derived from
office
is derived from
office
is derived from
office
is derived from
office
is derived from
officiating