ETYMOLOGY
from Latin anceps, -cipitis (two-edged or double)
EXAMPLE
“…of Planets amicall, benevolous, auspicious, fortunate; and inimicall, maleficall, unfortunate, exitiall; as also ancipitous, and indifferent to both (and all these sometimes roborated, and holpen; sometimes infirmed, and hindred one by another)…”
From: Πῦς-μαντία. (Pus-mantia) The Mag-Astro-Mancer,
Or The Magicall-Astrologicall-Diviner posed, and puzzled,
By John Gaule, 1652
Lexicophilia 