Pressure
Stress
noun
The pressure power is the pressure. This can also be stress as well.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
ロケットが大気に入るときには、ものすごい圧力がかかります。
When a rocket enters the atmosphere, it is subjected to tremendous pressure.
その報道は上からの圧力でもみ消されました。
The report was suppressed due to pressure from higher-ups.
日本はよく、同調圧力が強い国だと言われます。
Japan is often said to be a country where peer pressure is strong.