Not only is already used in this way informal, it can be downright peremptory and even aggressive, but it is always imperative It indicates that the speaker is out of patience and wants to end this part of the conversation and proceed to the next stage (or to exit it altogether) THANK YOU FOR THIS POST!"It's a question of getting over an unpleasant task" accomplish , carry out , carry through , fulfil , fulfill , action , execute put in effect;
The Sunk Cost Fallacy The Decision Lab