What does the idiom "A trying time" mean?

A trying time
English Meaning: Times of trouble, struggle, or unhappiness.
Bangla Meaning: কঠিন সময়।

Hence, the meaning of the idiom "A trying time" is - A period of difficulty and hardship.

Ex. Sentence: They have had a very trying time indeed.
Bangla Meaning: আসলেই তাদের খুব কঠিন একটা সময় গিয়েছে।

Source: Lecture.