Modelled after anniversaire, from Latin mēnsis (“month”). IPA(key): /mɑ̃.si.vɛʁ.sɛʁ/ mensiversaire m (plural mensiversaires) mensiversary...
Blend of anniversary + Latin mēnsis (“month”), perhaps through French mensiversaire. mensiversary (plural mensiversaries) (rare) A day that marks an exact...