Dado >n. the lower part of the wall of a room, below about waist height, if it is a different color or has a different covering than the upper part.

a groove cut in the face of a board, into with the edge of another board is fixed.

the part of a pedestal between the base and the cornice. 

Proxemics >plural n. [treated as singular] the branch of knowldege that deals with the amount of space that people feel it necessary to set between themselves and others.

Savoir faire >n. the ability to act or speak appropriately in social situations.

Unilateral >adj. 1 (of an action or decision) performed by or affecting only one person, group, or country involved in a particular situation, without the agreement of another or the others: unilateral  nuclear disarmament.