Theft, Stealing
noun, verbal noun, の adjective
You decided to steal... and then you steal again a few minutes later! Now you're wanted for theft. Stealing is wrong, you should have known better!
せっとう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
ストレス解消に窃盗を繰り返していたそうだ。
It seems that he keeps stealing for stress reduction.