kùn nan
difficult
challenging
straitened circumstances
difficult situation
Yú Shì nán
Yu Shi'nan (558-638), politician of Sui and early Tang periods, poet and calligrapher, one of Four Great Poets of early Tang 唐初四大家[Tang2 chu1 Si4 Da4 jia1]
yì jué kùn nan
to find sth increasingly difficult