Webster's Revised Unabridged Dictionary · 1913

Philter

Philter , noun

[French philtre, Latin philtrum, Greek fi`ltron, from filei^n to love, fi`los dear, loving.]

A potion or charm intended to excite the passion of love. — Addison

Philter , transitive verb

1.
To impregnate or mix with a love potion; as, to philter a draught.
2.
To charm to love; to excite to love or sexual desire by a potion. — Gov. of Tongue