peace (ending a war)

finally, at last / (with a negative) in the end

visit, call on, pay somewhere a visit / for an occurrence to come, arrive

end, conclusion / end-of-life, death

to end, to finish, to quit / to be in a hopeless position

end; conclusion; finish / death; collapse; fall

war (conflict involving organized use of arms)

to wage war

(mathematics) quod erat demonstrandum (that which was to be proved)

(Internet slang) a dead fad; out of fashion; no longer trendy