Correct

亘古

/ gèngǔ /
Strokes

Definition

throughout time/from ancient times (up to the present)

Example

As an Adverb

from time immemorial; in the remote past

1
Shìshàng
世上
méiyǒu
没有
gèn
亘古
biàn
de
dōng
东西
  

Nothing is eternally immutable.