hardhearted

Single men, though they may be many times more charitable, because their means are less exhaust, yet, on the other side, they are more cruel and hardhearted, because their tenderness is not so oft called upon.

那种独身人，虽然用很挥霍，但实际上往往是心肠很硬，因为他们不懂得怎样去爱他人。