sheerest

1. complete and without restriction or qualification; sometimes used informally as intensifiersExamples: "absolute freedom"; "an absolute dimwit"; "a downright lie"Synonyms: absolute, downright, out-and-out, rank, right-down, sheer

2. not mixed with extraneous elementsExamples: "plain water"; "sheer wine"; "not an unmixed blessing"Synonyms: plain, sheer, unmingled, unmixed

3. very steep; having a prominent and almost vertical frontExamples: "a bluff headland"; "where the bold chalk cliffs of England rise"; "a sheer descent of rock"Synonyms: bluff, bold, sheer

4. so thin as to transmit lightExamples: "a hat with a diaphanous veil"; "filmy wings of a moth"; "gauzy clouds of dandelion down"Synonyms: cobwebby, diaphanous, filmy, gauze-like, gauzy, gossamer, see-through, sheer