Similar in meaning, but slightly different in connotation:
* Calm: This is the most direct synonym for placid.
* Peaceful: This emphasizes the absence of conflict or disturbance.
* Tranquil: This suggests a state of quietness and serenity.
* Serene: This implies a sense of calm and peacefulness.
* Quiet: This focuses on the absence of noise or commotion.
* Still: This emphasizes the lack of movement or activity.
* Unruffled: This implies that something is not disturbed or agitated.
* Composed: This suggests a state of calmness and control.
Words with a similar meaning but slightly different usage:
* Mild: This can describe a person's temperament or a situation, emphasizing the lack of intensity.
* Gentle: This suggests a kind and soothing quality.
* Subdued: This implies a state of calmness and restraint.
The best word to use will depend on the specific context and the desired tone.