Cremation
noun, する verb
A fire burial is when you burn the body. You call this cremation.
かそう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
火葬のシステムは自動的に停止する訳ではありません。係の人が小窓から骨の様子を見ながら、終わったと思う時に止めるのです。
The cremation system doesn’t shut down automatically. The person in charge checks how the bones are doing from a small window once in a while and stops it when they think it’s done.