2 adjectives to describe uncovering

" A sort of grim uncovering of his teeth was Dunwody's smile.

For though unpowdered locks, and the partial uncovering of a muscular neck, by the loose tie of the silk handkerchief had something of the simplicity of republicanism, yet the fine diamond chat sparkled at the shirt breast, and the glittering of two watch-chains (the foppery of the day), exhibited an aristocracy of toilet, which did not exactly assort with the Back-lane graces.

2 adjectives to describe  uncovering