ulquordaëälathdar: (lit. “impossible-knowledge-person”, derog.) Agnostic; (Flamic) an adherent to the Agnostic Heresy; one who holds that certain or all knowledge cannot be known, i.e., is intrinsically unknowable, rather than simply unknown, or circumstantially unknowable due to lack of necessary epistemic tools or cognitive capacity.
from ulquordaëlin (“impossible”, itself from ulquor, the degree quantifier of absolute absence, and daëlin “probability, chance”), alath (“knowledge”) and dar (“person”).