Where does “lacuna” come from?
lacuna (Portuguese) comes from Latin lacūna, 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.
lacuna (Portuguese): hiatus; blank
Ancestry of “lacuna”, step by step