Unembellished.
Of tyres: whose surface is worn away.
Having areas (of fur or plumage) that are coloured white, especially on the head.
Having no hair, fur or feathers.
Without evidence or support being provided.
Having no hair on the head, or having a large area of bare scalp on top of the head although hair may still grow on the sides and back of the head.
Denuded of any covering.
To become bald.
A mountain summit or crest that lacks forest growth despite a warm climate conducive to such, as is found in many places in the Southern Appalachian Mountains.
Unidirectional.
Single, simple; not complex.
A monomorphemic word, one without affixes.
An analogue in a space of arbitrary dimensionality of the triangle or tetrahedron; the convex hull of n+1 linearly independent points in n-dimensional space; in other words, the triangle, tetrahedron etc., generalized to an arbitrary number of dimensions.