translucent

The window-panes, encrusted with perennial deposits of Atmosphere, were less transparent than translucent.

Mr. Blaine's powers and disposition shone resplendent. . . . the gavel in his practised hand, chiming in with varied tones that aptly enforced his words, from the sharp rat-tat-tat that recalled the House to decorum, to the vigorous thunder that actually drowned unparliamentary speech; rulings, repartee, translucent explanation flashing from his lips as quick as lighting.