placid

[ plas-id ]
/ ˈplæs ɪd /

adjective

pleasantly calm or peaceful; unruffled; tranquil; serenely quiet or undisturbed: placid waters.

Origin of placid

1620–30; < Latin placidus calm, quiet, akin to placēre to please (orig., to calm); see -id4

OTHER WORDS FROM placid

Example sentences from the Web for placidity

British Dictionary definitions for placidity

placid
/ (ˈplæsɪd) /

adjective

having a calm appearance or nature

Derived forms of placid

placidity (pləˈsɪdɪtɪ) or placidness, noun placidly, adverb

Word Origin for placid

C17: from Latin placidus peaceful; related to placēre to please