/,trɪbjʊ'leɪʃn; ,trɪbjə`leʃən/
n
1 [C, U] (rhet 修辞) (sad event, accident, illness, etc that causes) great trouble or suffering 忧患; 苦难; 带来极大困难或痛苦的伤心事、事故、病痛等
*He bore his tribulations bravely. 他勇敢地忍受着困苦.
* a time of great tribulation 极苦难的时期.
2 (idm 习语) trials and tribulations => trial.

n [U and C]formal
[Date: 1200-1300; Language: Old French;Origin: tribulacion, from Late Latin tribulatio, from Latin tribulare 'to press down, cause to suffer']
serious trouble or a serious problem
　Even close friends were unaware of the tribulations she faced.
→trials and tribulationsattrial¹ (5)