1. (noun) the slow passage of a liquid through a filtering medium

• percolation

1. (noun) a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)

• armed forces
• armed services
• military
• military machine
• war machine

1. (noun) a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)

• incursion
• penetration

2. (noun) the slow passage of a liquid through a filtering medium

• filtration

1. (noun) a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)

• infiltrate
• pass through
• infiltrate
• penetrate

2. (noun) the slow passage of a liquid through a filtering medium

• filter
• percolate
• permeate
• sink in
• infiltrate
• infiltrate
• leach
• percolate
• percolate
• percolate