詐欺さぎ
sagi

Noun

1. fraud; swindle; graft; cheating; trick; scam

わたくしかぎ、彼かれはその詐欺さぎたくらみには関与かんよしていません。
watashino shiru kagirika rewa sono sagino takuraminiwa kan'yo shite imasen
To my knowledge, he has not been involved in the fraud scheme.
Noun

2. saying you're going to do something but in the end not doing it; making promises without keeping them; flaking out

Colloquial