attendant

nouns

someone who waits on or tends to or attends to the needs of another
is derived from
a person who is present and participates in a meeting
"he was a regular attender at department meetings"; "the gathering satisfied both organizers and attendees"
is derived from
an event or situation that happens at the same time as or in connection with another

adjectives

being present (at meeting or event etc.) "attendant members of the congreation"
is derived from
is derived from
is derived from
is similar to
being or existing in a specified place
"the murderer is present in this room"; "present at the wedding"; "present at the creation"
following or accompanying as a consequence
"an excessive growth of bureaucracy, with attendant problems"; "snags incidental to the changeover in management"; "attendant circumstances"; "the period of tension and consequent need for military preparedness"; "the ensuant response to his appeal"; "the resultant savings were considerable"
is derived from