Thief
Robber
noun
A robber who steals is a thief. And still a robber, I guess.
とうぞく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
今度こそ盗賊の隠れ家を突き止めてやる。
I’ll find the thief’s hiding place this time.