Where does “Subiaco” come from?

Subiaco (English) comes from Latin Sublaqueum, from Latin lacus, from New Latin lacrimalis, from Latin lācrima, from Old Latin dacrima, from Proto-Italic *d(r)(k)akrunā, from Proto-Indo-European dáḱru-, from Proto-Indo-European dr̥ḱ-h₂eḱru- — eye bitter.

Ancestry of “Subiaco”, step by step

StepLanguageWordMeaning
1LatinSublaqueum
2Latinlacusa lake, pond, basin; reservoir; a tank, tub, vat,...
3New Latinlacrimalis
4Latinlācrimaa tear drop of liquid from crying
5Old Latindacrimatear
6Proto-Italic*d(r)(k)akrunā
7Proto-Indo-Europeandáḱru-tears; tear
8Proto-Indo-Europeandr̥ḱ-h₂eḱru-eye bitter
Every word from Proto-Indo-European dr̥ḱ-h₂eḱru-Every word from Proto-Indo-European dáḱru-Every word from Proto-Italic *d(r)(k)akrunā