Japanese edit

For pronunciation and definitions of ちんせい – see the following entries.
沈静
[adjective] tranquil, calm, quiet, dull
[noun] tranquility, calm, quiet
鎮静
[noun] tranquility, calm, quiet, pacification
[verb] to simmer down, to soothe, to suppress
(This term, ちんせい, is the hiragana spelling of the above terms.)