Definition of placid

adjective (a)

• Pleased; contented; unruffied; undisturbed; serene; peaceful; tranquil; quiet; gentle. (adjective)

  source: webster1913

adjective satellite (s)

• (of a body of water) free from disturbance by heavy waves (adj.all)

  Synonym: quiet, smooth, still, tranquil, unruffled
  

  Example:
  A ribbon of sand between the angry sea and the placid bay.
  

  source: wordnet30
• not easily irritated (adj.all)

  Synonym: equable, even-tempered, good-tempered
  

  Example:
  Not everyone shared his placid temperament.
  Remained placid despite the repeated delays.
  

  source: wordnet30

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