The word sabr means patience i.e. 'to refrain and withhold'.
And according to the famous linguistic in the Arabic language, known as Firozabadi, the word sabr may have different meanings according to the situation. When one has sabr when refraining from his sexual desires and temptations it is known as 'afeef' (Chastity), sabr when fighting the enemy in the battlefield is known as "shajaa'a" (Bravery) etc. They all encompass the same meaning which is to refrain and withhold from whatever is disliked, prohibited in islam etc.
This is why in Islam the only deed that will be rewarded with account is patience.