[fil-ter] 
noun, verb, -tered, -ter⋅ing.| 1. | a potion, charm, or drug supposed to cause the person taking it to fall in love, usually with some specific person. |
| 2. | a magic potion for any purpose. |
| 3. | to enchant or bewitch with a philter. |
| phil·ter also phil·tre (fĭl'tər) n.
To enchant with or as if with a philter. [French philtre, from Old French, from Latin philtrum, from Greek philtron, from philein, to love, from philos, beloved, loving.] |
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