S / sŏlĭdātĭo
noun

sŏlĭdātĭo

gen. sŏlĭdātōnis · gender feminine · decl. 3rd
a making firm; solid; a fastening; strengthening
a making firm or solid; a fastening, strengthening, Vitr. 5, 3, 3; 7, 1, 7.