Adjective

(en adjective)

Not disguised, plainly visible.

* 1854 , ,

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.

* 1885 , , Volume 1: Abbadie - Anne,

The bal masqué was ‘a scene of undisguised indecency, drunkenness, and vice.’

* 1890s , , Book 4, Chapter 5,

So when they perceived the approach of Agesilaus, the Argives and their friends left the offerings as they lay, including the preparations for the breakfast, and retired with undisguised alarm into the city by the Cenchrean road.

Adjective

(en adjective)

Relating to the basic, essential or fundamental part of something.

Relating to an elementary school.

(physics) Relating to a subatomic particle.

* {{quote-magazine, date=2012-03

, author=(Jeremy Bernstein) , title=A Palette of Particles , volume=100, issue=2, page=146 , magazine=(American Scientist) citation , passage=The physics of elementary particles in the 20th century was distinguished by the observation of particles whose existence had been predicted by theorists sometimes decades earlier.}}

(archaic) Sublunary; not celestial; belonging to the sublunary sphere, to which the four classical elements (earth, air, fire and water) were confined; composed of or pertaining to these four elements.