laudanum

n [U] (esp formerly) opium prepared for use as a sedative （尤指旧时）鸦片酊（用作镇静剂）.

lath, lathe, lather, Latin, Latin America, Latin cross, Latinist, latish, latitude, latitudinal, latitudinarian, latrine, latter, latter-day, latterly, lattice, lattice window, laud, laudable, laudably, laudatory, laugh, laugh at, laugh off, laugh over, laughable, laughably, laughing, laughing-gas, laughing-stock, laughingly, laughter, launch, launch balloon, launch out, launching pad (also `launch pad), launder, launderette (also laundrette), laundress, laundromat,