(architecture) square, plaza, piazza / (architecture) circus

down! (command to lie down, especially for a dog)

singular imperative of platzen

(idiomatic) to have a seat, to take a seat

singular imperative of aufplatzen / first-person singular present of aufplatzen

Red Square (large historical square in central Moscow)

(idiomatic) misplaced, out of place

(childish) Said spitefully when someone takes another's seat and the latter claims it back.

to burst / to make an emotional outburst, "to explode" / to be suddenly or unexpectedly canceled / to bounce

(colloquial) claustrophobia