seepverb [ I + adv/prep ]
uk/siːp/us/siːp/to move or spread slowly out of a hole or through something:
Pesticides are seeping out of farmland and into the water supply.
figurative Given the intense secrecy of the arms business, information only seeps out in company literature.
seepage
noun [ U or C ] uk/ˈsiː.pɪdʒ/us/ˈsiː.pɪdʒ/
Oil spills and seepage from refineries are common.