elect, select, choose, prefer
選 centers on picking one option from several: electing, selecting, choosing, or preferring something over others.
選 combines 辶 (movement) with 巽, which likely contributes the sound and relates to selecting or arranging. The exact historical development of 巽 is uncertain.
The movement radical 辶 suggests an action, and the inner part 巽 looks like a hand picking items from a pile. Together, 選 means to choose or select.
For セン, imagine a selection of one thousand (千, せん) items: 千 -> セン, and you must choose the best one.
to choose; to select; to pick (out)
player (of a sport); athlete; team member
election
choice; selection; option
selection; choice; choosing; picking; election
being elected
choices; alternatives; options
preliminary contest; qualifying round; trial; heat
championship; title (of champion)
lottery; raffle; drawing (of lots); balloting
selection
failing to be elected; election defeat; losing an election
selection; choice; picking out
selection; choice; screening
election; selection; choice
selection; sorting; culling; screening; triage
special selection; special approval
selecting a suitable person; personnel selection
re-election; reelection
nomination (of a person to a position); selection; election; assignment; appointment
being selected (for a prize, exhibition, etc.); being accepted; winning
election (for a seat or position at the end of a term)
public election; election by popular vote
special selection; finest pick; top pick
careful selection
recommendation
judge; selector
to choose; to select; to pick out
election by mutual vote; election from within a committee (party, etc.); internal vote
third-term election
small electoral district; single-member constituency
universal suffrage
final vote; run-off ballot
direct election
general election (of the lower house)
to classify; to sort out; to sift through
Olympic village; athlete's village
elective subject or course
voter; constituent; elector
election campaign
suffrage; right to vote
election campaign; political campaign; campaigning; electioneering; canvassing