This is the 10137th most frequent Turkish word.
başarısızlıkla
"Failure" or "unsuccessfulness."
In this sentence, "başarısızlıkla" means "unsuccessfully" and describes the manner in which the project was completed.
O, projeyi başarısızlıkla tamamladı.
He completed the project unsuccessfully.
Here, "başarısızlıkla" conveys that the trials ended in failure, showing an outcome rather than a manner.
Başarısızlıkla sonuçlanan denemeleri yeniden gözden geçirdi.
He reviewed the trials that ended in failure.
In this usage, "başarısızlıkla" signifies "with failure" or "in the face of failure," indicating a challenge to be addressed.