Without any additives, or without some component that would usually be included.
Bare, not covered by clothing.
Unprotected, uncovered; (by extension) without a condom.
Where the writer (seller) does not own the underlying asset to cover the contract.
Resourceless, poor, lacking means.
Glib, without decoration, put bluntly.
Unaided, unaccompanied.
Barren, having no foliage, unvegetated.
Characterized by the nakedness of the people concerned or to whom the described noun is attributed.
Lacking or devoid of something.
Uncomfortable or vulnerable, as if missing something important.
Of a singularity, not hidden within an event horizon and thus observable from other parts of spacetime.
Not manufactured.