ephemeral (adjective) ephemeral: momentary, passing
Sinonime: bow, break in, break the ice,
commence,
commission,
dedicate, get things rolling, get under way, induct,
initiate, instate,
institute, introduce,
invest,
jump, kick off,
launch, make up, open,
ordain, originate, set in motion,
set up,
start, usher in
Antonime: adjourn,
close,
end,
stop, uninstall