Disappoint

[Jason Yan]

To defeat of expectation or hope; to hinder from the
attainment of that which was expected, hoped, or desired; to balk; as,
a man is disappointed of his hopes or expectations, or his hopes,
desires, intentions, expectations, or plans are disappointed; a bad
season disappoints the farmer of his crops; a defeat disappoints an
enemy of his spoil.

[Kai]

The feeling you get when you [uncap] a [pen] and it doesnt turn into a [sword]