luctu
luctu is a Latin form of lugeo, meaning “mourn, grieve for”.
It can also be a form of luctus, “grief, mourning, sorrow”. It is the ablative singular masculine noun or supine dative singular neuter.
Found 191 times in the Latin texts on Socratos.
Where it is used
Cicero, Pro S. Roscio Amerino 23: … a iste T. Roscius, vir optimus, procurator Chrysogoni, Ameriam venit, in praedia huius invadit, hunc miserum, luctu perditum, qui nondum etiam omnia paterno funeri iusta solvisset, nudum eicit domo atque focis patriis disque …
All forms of lugeo (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.