透

unobstructed view, perspective, visibility, vista, forecast, outlook, prospect, prediction, insight, foresight

opacity

transparency, cleanness

to go by, to go past, to go along, to travel along, to pass through, to use (a road), to take (a route), to go via, to go by way of, to run (between), to operate (between), to connect, to go indoors, to go into a room, to be admitted, to be shown in, to be ushered in, to come in, to penetrate, to pierce, to skewer, to go through, to come through, to permeate, to soak into, to spread throughout, to carry (e.g. of a voice), to reach far, to be passed on (e.g. of a customer's order to the kitchen), to be relayed, to be conveyed, to pass (a test, a bill in the House, etc.), to be approved, to be accepted, to go by (a name), to be known as, to be accepted as, to have a reputation for, to be coherent, to be logical, to be reasonable, to be comprehensible, to be understandable, to make sense, to get across (e.g. of one's point), to be understood, to be straight (e.g. wood grain), to be well-informed, to be wise, to do ... completely, to do ... thoroughly

to let pass, to overlook, to continue, to keep, to make way for, to persist in

permeation, penetration, soaking, osmosis

permeation, penetration, soaking, osmosis

crevice, crack, gap, opening

crevice, crack, gap, opening

to look through, to hold up to the light, to make an opening, to leave space, to space (lines), to prune (trees), to fart without making a sound