選

It is commonly used in the sense of choosing, selecting, or making a decision.

Still highly productive in modern vocabulary (especially politics, competitions, education).

Often contrasts with 탈락 (落選, “to fail selection / to lose election”).

Common compounds:

선거 (選擧) – election;

선발 (選拔) – selection, recruitment;

선택 (選擇) – choice, option;

당선 (當選) – election victory, being chosen;

입선 (入選) – being selected, winning a competition.