diffident \DIF-uh-dunt; -dent, adjective:
1. Lacking self-confidence; distrustful of one’s own powers; timid; bashful.
2. Characterized by modest reserve; unassertive.
Even though professional and personal rejection can make you feel diffident, slash hopeless, the only thing you can do is keep trying. Because if they’re not going to hire you if you apply, they’re certaintly not going to if you don’t.