Indifference to pleasure or pain

Solution (By Examveda Team)

One word substitute is Stoicism.

Docility: easily managed or handled.
Stoicism: the endurance of pain or hardship without the display of feelings and without complaint.
Patience: the capacity to accept or tolerate delay, problems, or suffering without becoming annoyed or anxious.
Reticence: the quality of being reticent; reserve.