gèn
extending all the way across
running all the way through
gèn gǔ
throughout time
from ancient times (up to the present)
mián gèn
to stretch in an unbroken chain (esp. of mountains)
gèn gǔ wèi yǒu
unprecedented
never seen since ancient times
pán gèn
linked in a unbroken chain
gèn gǔ tōng jīn
from ancient times up to now
throughout history
gèn gǔ bù biàn
unchanging since times immemorial (idiom)
unalterable
unvarying
monotonous