The term 'trickled (through)' can be described by two crossword solutions: 'SEEPED' (6 letters) and 'OOZED' (5 letters). Seepage is the slow, gradual movement of liquid through a porous material, such as soil or rock. Oozing is a similar process, but it is usually used to describe the slow, steady flow of a viscous liquid, such as oil or tar. Both processes involve the slow, steady movement of a liquid through a material, which is what the term 'trickled (through)' implies.