imponderable
I
adjective
immaterial, immateriate, impalpable, imponderous, impossible to calculate, impossible to measure, impossible to weigh, incalculable, incapable of being evaluated, incomputable, inestimable, intangible, subtile, unsubstantial, unweighable, vague
II
index
intangible
Burton's Legal Thesaurus.
William C. Burton.
2006