filter / philtre [ˈfɪltɜr]
filter – n. & v. – n. – 1. a porous material through which a liquid or gas is passed to separate the liquid from suspended particles – a device containing such a substance; 2. any of various electrical, electronic, acoustic or optical devices that reject signals, vibrations or radiations of certain frequencies but pass others; v. – 1. tr. to remove by passing through a filter; 2. intr. to pass through a filter; 3. intr. to come or go gradually or in small groups; 4. tr. to screen, sieve or sort according to size
philtre (philter) – n. & v. – n. – 1. a love potion; 2. a magic potion or charm; v. – 1. to enchant with or as if with a philtre