古人

people of ancient times / the ancients / extinct human species such as Homo erectus or Homo neanderthalensis / (literary) deceased person

surname Gu

ancient / old / paleo-

person; people / CL:個|个[ge4],位[wei4]

(idiom) unprecedented / unheard of

Mongol

ancient human species such as Homo erectus and Homo neanderthalensis

paleoanthropology

to fret over the worries of long-departed people (idiom); to worry unnecessarily / crying over spilt milk / often used with negatives, e.g. no need to worry about past issues

to fret over the worries of long-departed people (idiom); to worry unnecessarily / crying over spilt milk / often used with negatives, e.g. no need to worry about past issues

People's Republic of Mongolia (from 1924)

unique / unprecedented (idiom)

there has never been and never will be another person like this (idiom) / never done before and unlikely to be matched in the future / peerless