Oskiljaktig, inseparable.
Oskrymtad, unfeigned, sincere.
Oskuld, innocence.
Oskummad, unskimmed, new.
Oskyldig, innocent.
Oslipad (om knifvar) unsharpened; (om diamanter o. d.) uncut, rough.
Osmak, distaste, disgust.
Osmaklig, insipid, disgusting.
Osminkad, unpainted, (bildl.) plain, undisguised.