Senses
忍心 to have the heart to
To be hard-hearted enough to do something; to steel oneself to a task. Often used in the negative form 不忍心 meaning "cannot bear to".
忍心 hard-hearted
(bound form) Unfeeling, cruel, or merciless.
忍心 to have patience
(literary) To have patience; to endure with a patient mind.