a, d, e, l, n, m, t, i, u are letters that make 'unilluminated'
mi, te, Min, UN, MI, Ted, at, nil, ED, ill, illuminated, il, in, mina, IL, IN, Ate, At, In, Lu, Ni, Na, Te, min, illuminate are words within 'unilluminated'
1 possible definitions for 'unilluminated'
Under this definition, unilluminated is an adjective and has the following properties:
pitch blackness, blackness, black, total darkness, lightlessness are derivatives of 'unilluminated'.
dark is similar to unilluminated.
"came up the lightless stairs", "the unilluminated side of Mars", "through dark unlighted (or unlit) streets"