13-letter words containing b, u, y, d
- uninhibitedly — in an uninhibited manner
- unpredictably — not predictable; not to be foreseen or foretold: an unpredictable occurrence.
- upgradability — an incline going up in the direction of movement.
- vitreous body — a transparent gelatinous substance, permeated by fine fibrils, that fills the interior of the eyeball between the lens and the retina