placid russian

• споко́йный

  calm

  tranquil, placid, quiet, serene, easy-going, composed, easy

  slow

• благоду́шный

  good-natured, good-minded

  friendly, kindly, placid

• благоду́шно

  good-naturedly

  friendlily, kindlily, placidly

• благоду́шие

  kindliness, placidity, mildness of temper, good humour

• безмяте́жность

  serenity, tranquillity, placidity