Surrender
Part of speech: verb
Definition: To give up into the power, control, or possession of another; specifically (Military) to yield (land, a town, etc.) to an enemy. To give oneself up into the power of another, especially as a prisoner; to submit or give in to.
Part of speech: noun
Definition: An act of surrendering, submission into the possession of another; abandonment, resignation. The yielding or delivery of a possession in response to a demand. The yielding of the leasehold estate by the lessee to the landlord, so that the tenancy for years merges in the reversion and no longer exists.
Example sentence: The physical toughness is the obvious - the ability to push through things no matter what's coming at you, to keep going, to not give in. Never surrender. Usually the victory goes to the guy who can play through it the longest. Of course, the mental part is equally important.
Yielding
Part of speech: verb
Definition: To pay, give in payment; repay, recompense; reward; requite.
Part of speech: adjective
Definition: docile, or inclined to give way to pressure
Part of speech: noun
Definition: a concession