Where does “lacunaire” come from?
lacunaire (French) comes from French lacune, 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- — eye bitter.
lacunaire (French): incomplete
Ancestry of “lacunaire”, step by step