In Nasmyth's case, however, the rise of water had made his task almost insuperably difficult, and it had already left a certain mark on him.
"The Greater Power"
Harold Bindloss W. Herbert Dunton
He looked at her with a hint of astonishment and something that suggested a natural curiosity as to the cause for the visit, which she now found it insuperably difficult to explain.
"A Prairie Courtship"
Harold Bindloss
Not insuperably, I hope.
"The Greater Inclination"
Edith Wharton