A placid person or animal is calm and does not easily become excited, angry, or upset. She was a placid child who rarely cried + placidly plac·id·ly `No matter, we will pay the difference,' Helena said placidly
free from disturbance; "a ribbon of sand between the angry sea and the placid bay"; "the quiet waters of a lagoon"; "a lake of tranquil blue water reflecting a tranquil blue sky"; "a smooth channel crossing"; "scarcely a ripple on the still water"; "unruffled water"