happening

accident, incident, event, occurrence, happening

这些名词均有“事故、事件”之意。
accident: 强调偶然或意外发生的不幸事情。
incident: 既可指小事件或附带事件，又可指政治上具有影响的事件或事变。
event: 可指任何大小事件，但尤指历史上的重大事件。
occurrence: 多指日常生活中发生的一般事件，有时也指偶然发生的事。
happening: 与occurrence相似，多指日常生活中发生的一般事件，有时也指偶然发生的事。

名词 happening:

1. an event that happens
   同义词：occurrence, occurrent, natural event

动词 happen:

1. come to pass
   同义词：happen, hap, go on, pass off, occur, pass, fall out, come about, take place
2. happen, occur, or be the case in the course of events or by chance (Santayana)
   同义词：happen, befall, bechance
3. chance to be or do something, without intention or causation
   同义词：happen
4. come into being; become reality
   同义词：happen, materialize, materialise
5. come upon, as if by accident; meet with
   同义词：find, happen, chance, bump, encounter

形容词 happening:

1. taking place

1. What's happening in that room? It's (like) bedlam in there.
   那个房间里怎麽了? 乱哄哄的。
2. Can you fill me in on what has been happening?
   你能把发生的事情原原本本地告诉我吗？
3. What's happening?
   怎么啦？
4. Accidents on that highway are happening with increasing frequency.
   那条高速公路上车祸发生得越来越频繁。
5. I am oblivious to what was happening.
   我对发生的事情没有记忆了。
6. A significant occurrence or happening.
   大事具有重要意义的事件或事变
7. Happening by a fortunate accident or chance.
   幸运地发生的因某种幸运事件或机会而发生的

hap.pen.ing

n.（名词）
Something that takes place; an occurrence.See Synonyms at occurrence
偶然发生的事；事件参见 occurrence
An improvised, often spontaneous spectacle or performance, especially one involving audience participation.
事件剧：一种即兴的、通常是自发的、尤指由观众参与的场景或演出