sedate
adj.安静的(calm, composed)
tranquil
adj.安静的(serene, quiet, peaceful)
It is not easy to remain tranquil when events suddenly change your life.
当事情突然改变你的生活时，保持平静不容易。
placid
adj.安静的(tranquil, serene)
The baby looks so placid and content after she has been fed.
宝宝吃完东西后看起来很平静、很满足。
static
adj.静的，静态的(changeless, stagnant)
Static air pressure indicates that the weather will not change soon.
静态气压表明天气不会很快变化。
serene
adj.平静的(tranquil)
pacify
vt.使平静，安慰，抚慰
An army was required in order to pacify the islands.
需要一支军队来平定这些岛屿。
serenity
n.安静；从容(calmness, tranquility)
still
adj.依然(nevertheless);静止的(motionless, stationary, fixed)
The old man sat still, waiting for the death of his physical life.
老人一动不动地坐着，等待他肉体生命的死亡。
lull
vt.使平静(calm down, soothe)
The mother lulled her baby to sleep.
母亲哄孩子入睡。
restful
adj.宁静的
quietude
n.平静，寂静(tranquility)
squalidity
n.污秽，脏污，肮脏(filth)
squalor
n.肮脏，污秽
dinginess
n.暗淡；肮脏
filthy
adj.不洁的，污秽的
defile
vt.染污
The river was defiled with sewage.
这条河被污水污染了。
filth
n.污秽，污物(dirt);猥亵
nastiness
n.污秽,不洁
soilage
n.弄脏，污秽