indefinable (adj.)

• aleatory
• amorphous
• blurred
• blurry
• broad
• chance
• chancy
• chaotic
• confused
• disordered
• foggy
• fuzzy
• general
• hazy
• hit-or-miss
• ill-defined
• imprecise
• inaccurate
• inchoate
• incoherent
• indecisive
• indefinite
• indescribable
• indeterminable
• indeterminate
• indistinct
• ineffable
• inexact
• inexplicable
• inexpressible
• inextricable
• insoluble
• insolvable
• lax
• loose
• mysterious
• mystic
• noncommunicable
• nonspecific
• obscure
• random
• shadowy
• shapeless
• stochastic
• sweeping
• unaccountable
• unclear
• undefinable
• undefined
• undetermined
• unexplainable
• unmentionable
• unnameable
• unsolvable
• unspeakable
• unspecified
• untellable
• unutterable
• vague
• veiled