Attempt
Failed Attempt
noun, suffix, の adjective
When you try something but can not yet accomplish it, it's only an attempt that failed or stayed incomplete. That's 未遂, and it's often used in legal contexts for crimes that didn't succeed.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
彼は取り付け騒ぎを防ぐ為にもう少しで預金者に嘘をつくところだったが、結局未遂に終わった。
He was very close to lying to depositors to prevent a bank run, but in the end he gave up on the attempt.