antediluvian, adj.
so extremely old as seeming to belong to an earlier period
<adj.all>
antediluvian antiquated archaic
sample sentences
"a ramshackle antediluvian tenement""antediluvian ideas"
"archaic laws"
semantic pointers
similar to
of or relating to the period before the biblical flood
<adj.pert>
antediluvial antediluvian
sample sentences
"antediluvian man"
lexical pointers
derived from/pertains to