fastness

His spirit retired far into its fastness, taking with it all his energies.

Hardened men with a hardened code, they lived in their fastness like Ishmaelites.

He advised a retreat for the night, and an attack on Walter when he should have left the fastness.

What is meant by the expression “fastness of color of two fabrics”?

I did not come to you and say, 'Let me beard the cook in her fastness.

The outlaws had chosen to take him to their fastness in the hills.

It was their fastness, their fortress, and often their home.

Steaming turns the shade greener and darker, and increases the fastness.

It increases the fastness of the colours to washing and soaping.

The direct blues as a rule have a good degree of fastness to light.