Impartial, a.
Etymology: [Pref. im- not + partial: cf. F. impartial.]
Not partial; not favoring one more than another; treating all alike; unprejudiced; unbiased; disinterested; equitable; fair; just. Shak. Jove is impartial, and to both the same. Dryden. A comprehensive and impartial view. Macaulay.
Shades of meaning
Fernald has no entry of its own for impartial; he lists it under candid.
He lists it without comment; the entries above explain its neighbors.