καταβυρσοῦν
From LSJ
ἡ τῆς παιδογονίας συνουσία → sexual intercourse for the purpose of bearing children
Greek > English (Woodhouse Verbs Reversed)
(see also: καταβυρσῶ, καταβυρσόω) cover with hides
Lexicon Thucydideum
corio contegere, to cover with leather, 7.65.2, [Vat. Vatican manuscript κατεβύσωσαν].