ショック

しょっく
noun, na-adjective
shock
1. shock, emotional distress
A sudden and disturbing effect on emotions caused by unexpected news or events.
I was shocked when I heard the news.
ショックを受ける = to be shocked
I was shocked to hear she's getting married.
Used as na-adjective
It took time to recover from the major shock.
2. shock (medical)
A life-threatening medical condition caused by severe injury, blood loss, etc.
The patient went into shock.
ショック状態 = state of shock
He lost consciousness from shock due to massive blood loss.
At the accident scene, we covered the injured person with a blanket to keep them warm so they wouldn't go into shock.
ショックを起こす = to go into (medical) shock

ショック (from English "shock") most commonly refers to emotional shock from unexpected or upsetting news. It also has a medical meaning (sense 2).

COMMON PATTERNS:

AS NA-ADJECTIVE:
ショックだ / ショックだった can be used predicatively: そのニュースショックだった (That news was a shock).

SIMILAR WORDS:

NOTE:
For electric shock, use 感電(かんでん) or 電気(でんき)ショック.