casual

irregular, casual, informal

random, casual

形容词 casual:

1. marked by blithe unconcern
   同义词：insouciant, nonchalant
2. without or seeming to be without plan or method; offhand
3. suited for everyday use
   同义词：everyday
4. occurring or appearing or singled out by chance
   同义词：accidental, chance
5. hasty and without attention to detail; not thorough
   同义词：cursory, passing, perfunctory
6. occuring from time to time
   同义词：occasional
7. characterized by a feeling of irresponsibility
   同义词：fooling
8. natural and unstudied
   同义词：free-and-easy
9. not showing effort or strain
   同义词：effortless

1. Such casual dress would not be correct for a formal occasion.
   这样的便服不宜在正式的场合穿。
2. He likes casual attires.
   他喜欢休闲服装。
3. A casual newspaper reader wouldn't like articles on politics everyday.
   不经心的报纸读者不会喜欢每天都有政论文章。
4. John is a casual; he can't find a proper job anywhere.
   约翰是个临时工，他到处找不到正式工作。
5. She is casual about winning the prize.
   她对获奖漫不经心。

ca.su.al

adj.（形容词）
Occurring by chance.See Synonyms at chance
偶然发生的参见 chance

Occurring at irregular or infrequent intervals; occasional:
临时的，间或的：不规则或不经常地间断发生的；偶然发生的：
例句：
casual employment at a factory; a casual correspondence with a former teacher.
工厂的临时雇佣人员；与先前老师的不定期通信

Unpremeditated; offhand:
非预谋的；随便的：
例句：
a casual remark.
即席发言

Being without ceremony or formality; relaxed:
放松的：没有仪式或规格的；放松的：
例句：
a casual evening with friends.
与朋友的轻松聚会

Suited for everyday wear or use; informal.
轻便的，非正式的：适于每日穿着或使用的；非正式的
Not serious or thorough; superficial:
肤浅的，漫不经心的：不严重或不全面的；浮浅的：
例句：
a casual inspection.
漫不经心的调查

Showing little interest or concern; nonchalant:
不关心的，无动于衷的：表现出较小兴趣或关心的；不关心的：
例句：
a casual disregard for cold weather.
对于寒冷天气毫不在乎

Lenient; permissive:
宽大的；允许的：
例句：
a casual attitude toward drugs.
对毒品的听任态度

Not close or intimate; passing:
不熟悉的：不接近的或不亲近的；忽略的：
例句：
a casual acquaintance with avant-garde music.
略知先锋派音乐

n.（名词）
One that serves or appears at irregular intervals, especially a temporary worker.
临时工：不定时服务或出现的人，尤其指临时工
Often casuals Casual clothing.
常作 casuals 便装
A soldier temporarily attached to a unit while awaiting permanent assignment.
暂编人员，分遣员：暂时编入某一单位等候固定任命的军士

来源：
Middle English casuel
中古英语 casuel
from Old French
源自 古法语
from Latin c3su3lis
源自 拉丁语 c3su3lis
from c3sus [event] * see case
源自 c3sus [事件] *参见 case

【引伸】
ca.sually
adv.（副词）
ca.sualness
n.（名词）