French étancher

← Spanish estancar (cognate)

← Old French estanchier (inherited)

← Italian stanco (cognate)

← Italian stancare (mention)

← Latin *stānticus (mention)

← Latin stans (inherited)

→ French étanche (mention)

→ French étanchement (suffix)

→ Italian stanco (mention)

→ Romanian etanșa (borrowed)