Inhibition
Noun, する verb, and の adjective
そがい
カフェインを含む飲み物は、睡眠を阻害します。
Drinks containing caffeine inhibit sleep.
Thwart and damage the advancement of something. That's an obstruction and inhibition.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.