The story
- Latin · borrowed frombi-“twice”
- English todaybiplicity
From Latin bi- (“twice”). Bailey (1736) suggests borrowing from Latin biplicitas, but this is not well attested. Compare duplicity, from Latin duplicare (“double”).
Words from the same roots
Latinbi- all →
bi-biloquiumbinocle
Etymology from Wiktionary, CC BY-SA 4.0.