Undisguised

"Whatever have you been doing with yourself, Watson?" he asked in undisguised wonder, as we rattled through the crowded London streets.

Source: tatoeba (6289677)

I affirm emphatically that no professor has a moral right to treat anybody with this undisguised "insolence of office," or to use any weapon but reason in order to put down what he conceives to be errors in philosophy.

Source: tatoeba (11580308)

The Major-General has already been made aware of the fact, that a large number of ill-disposed persons have, for some days, been openly organizing, drilling, and equipping themselves, with the undisguised object of attacking her Majesty's troops, and, if possible, subverting the Government.

Source: wiktionary

1885, Edward Dutton Cook, Anderson, John Henry, article in Dictionary of National Biography, 1885-1900, Volume 1: Abbadie - Anne, The bal masqué was ‘a scene of undisguised indecency, drunkenness, and vice.’

Source: wiktionary