quadruplicate
adj.
1650s, from Latin quadruplicatus, past participle of quadruplicare "make fourfold," from quadri- "four" (see quadri-) + plicare "to fold" (see ply, v.1).
v.
1660s, from Latin quadruplicatus, past participle of quadruplicare "make fourfold," from quadri- "four" (see quadri-) + plicare "to fold" (see ply, v.1). Related: Quadruplicated; quadruplicating.