도란도란, doran-doran: two or three people talking quietly and fondly together. The sound of the word is already the meaning. There is not one hard consonant in it; the tongue simply rolls.
On a hot night with the windows open you hear the real thing. Late, from a bench downstairs or somebody's veranda — a low unhurried back-and-forth that breaks into laughing now and then. You cannot make out a single word of it, and it does not matter in the least.
A raised voice goes over a wall and becomes a quarrel. Doran-doran goes over a wall and becomes something to fall asleep to.