I did not catch those few roses because they were well hidden behind a thicket of thorns.
If there was any nervousness, any tension, it was well hidden.
The new rules for kleptocrats: Keep your Bentley well hidden in the garage in Mayfair.
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."