冷静【れいせい】
calmness, composure, coolness, serenity, presence of mind
静か【しずか】
quiet, silent, slow, unhurried, calm, peaceful
静かに【しずかに】
calmly, quietly, gently, peacefully, be quiet!
静止【せいし】
stillness, repose, standing still
動静【どうせい】
state (of affairs), condition, developments, movements
静寂【せいじゃく】
silence, stillness, quietness
安静【あんせい】
rest, quiet, repose
静まる【しずまる】
to become quiet, to quiet down, to quieten down, to calm down, to die down, to subside, to abate, to be suppressed
静粛【せいしゅく】
silent
閑静【かんせい】
quiet (e.g. neighbourhood), peaceful, tranquil
静物【せいぶつ】
still object, object at rest, still life (painting, drawing)
沈静【ちんせい】
stillness, tranquility, tranquillity, dullness
静養【せいよう】
(convalescent) rest
静める【しずめる】
to quiet (a child, crowd, etc.), to quieten, to make quiet, to calm (one's nerves, excitement, etc.), to compose (oneself), to appease (someone's anger), to pacify, to settle (e.g. discord), to suppress (a rebellion, riot, fire, etc.), to quell, to put down, to get under control, to relieve (a cough, pain, etc.), to soothe, to alleviate, to ease, to appease (a spirit, soul, etc.), to pacify, to soothe
静脈【じょうみゃく】
vein
静けさ【しずけさ】
stillness, silence, quiet, hush, calm, serenity
静観【せいかん】
watchful waiting, careful supervision
平静【へいせい】
calm, serenity, tranquillity, tranquility
静まり返る【しずまりかえる】
to fall completely silent, to become still as death
静電気【せいでんき】
static electricity