Correct

泰山

/ tài shān /
Strokes

Definition

Mt Tai in Shandong, eastern mountain of the Five Sacred Mountains 五岳[wǔ yuè]

Example

As a Noun

Mount Taishan [Eastern Sacred Mountain in Shandong Province]—symbol of great weight or importance

1
huò
chóngtàishān
重于泰山
  
,
huò
qīnghóngmáo
轻于鸿毛
  

Death could be either of great importance or without any significance.

As a Noun

father-in-law [another name for wife's father(岳父)]