The eyes take in that hiddenness in a way the mind alone never could.
The gifts she needed from the Holy Ghost were those of hiddenness, patience, humility, conformity to God's will.
late 14c., from hidden + -ness.
past participle of hide (v.1); a Middle English formation (Old English had gehydd "hidden") on the model of ride/ridden, etc. Hidden persuaders (1957) was Vance Packard's term for "ad men."