placid

[plas-id] /ˈplæs ɪd/
adjective
1.
pleasantly calm or peaceful; unruffled; tranquil; serenely quiet or undisturbed:
placid waters.
Origin
1620-30; < Latin placidus calm, quiet, akin to placēre to please (orig., to calm); see -id4
Related forms
placidity
[pluh-sid-i-tee] /pləˈsɪd ɪ ti/ (Show IPA),
placidness, noun
placidly, adverb
unplacid, adjective
unplacidly, adverb
unplacidness, noun
Synonyms
See peaceful.
Examples from the web for placid
  • And the placid beasts still gazing with their mild eyes full of loving.
  • Even placid Oman is being dragged into the row.
  • The colonial society seems placid, prospering at a Neolithic level, with the world populated by small farming villages.
  • His demeanor was as placid as that of a midnight watchman finishing his shift.
  • The heat is searing and the mood placid.
  • No matter how placid it may look, water always holds danger.
  • Houseboats are usually the stuff of lakes, bays, and placid rivers.
  • Donald took umbrage, but he seethed beneath a seemingly placid exterior.
  • But beyond the state's borders, the reaction has been anything but placid.
  • If their expressions are placid, they're pleased.
British Dictionary definitions for placid

placid

/ˈplæsɪd/
adjective
1.
having a calm appearance or nature
Derived Forms
placidity (pləˈsɪdɪtɪ), placidness, noun
placidly, adverb
Word Origin
C17: from Latin placidus peaceful; related to placēre to please
Word Origin and History for placid
adj.

1620s, from French placide (15c.) and directly from Latin placidus "pleasing, peaceful, quiet, gentle, still, calm," from placere "to please" (see please). Related: Placidly; placidness.