strong water

noun3

1. •
   (no longer used) A strong drink, (particularly) distilled spirits.

   • Strong-Waters are apt to give me the Head-ache—I hope, Madam, you will excuse me. — 1728
2. •
   (no longer used) A strong solvent, (particularly) nitric acid.
3. •
   (no longer used) Synonym of aqua fortis.