1. 生苦  shēng kǔ
2. 老苦 lǎo kǔ
3. 病苦 bìng kǔ
4. 死苦 sǐ kǔ
5. 愛別離苦  ài bié lí kǔ
6. 怨憎會苦 yuàn zēng huì kǔ
7. 求不得苦 qiú bù dé kǔ
8. 五陰熾盛苦 wǔ yīn chì shèng kǔ

birth
old age
sickness
death
separation from loved ones
closeness to loathsome people
not getting what one wants
the five aggregates