placid
adjective
[ ˈplasɪd ]
• not easily upset or excited.
• "a placid, contented man"
Similar:
even-tempered,
calm,
equable,
tranquil,
imperturbable,
unexcitable,
peaceable,
peaceful,
serene,
mild,
gentle,
quiet,
cool,
cool-headed,
collected,
and collected,
composed,
self-possessed,
poised,
easy-going,
temperate,
level-headed,
steady,
unruffled,
unmoved,
undisturbed,
unperturbed,
unemotional,
phlegmatic,
stolid,
bovine,
unflappable,
nonplussed,
equanimous,
Origin:
early 17th century: from French placide, from Latin placidus, from placere ‘to please’.