Preposition: through

• soil: These are applied to arable land as fertilizers and inevitably some washes into the river or percolates through the soil and into the aquifer.

• shingle: It was explained how despite the heavy rainfall in March and April the lagoon depended on the high tide to percolate through the shingle.

• sand: Rainwater percolates through the sands of the Upper Greensand but cannot sink into the clay.

Preposition: into

• soil: Much depends on whether the water drains off or percolates into the soil.

• ground: All rainwater is allowed to percolate back into the ground via a graveled parking area.

Modifying Another Word

• slowly: Espresso Machine, Moka Pot: This should always be a fine grind, the espresso should percolate slowly producing a rich " crema "

• not: Thus modern phosphate does not percolate to prehistoric levels.

• down: This amount of water should percolate down to about 20 cm in normal soil.

• downwards: The acid was allowed to percolate downwards until it disappeared from sight.

Noun used with modifier

• water: When it rains, water percolates through the patio and boxes beneath and is trapped by the membrane.

Followed by an intransitive particle

• around: A number of idle speculations that percolated around in the back of my head.