insurmountable [Adjective] + difficulty [Noun]

Strength Strength Dispersion
A:
8
CHISQ:
209.71
AWT:
8,429,897
TTEST:
2.73
G2:
45.14
FAWT:
6.45
MI:
4.81
LOGLOG:
14.44
JD:
0.66
MI3:
10.81
DICE:
0.12
RANGE: