留 - detain, fasten, halt

repeating a year (at school); staying in the same class for another year

staying behind; remaining; residual

reserving; withholding

clasp; latch; catch; fastener

stationing (e.g. of troops); garrison

remaining in office; staying in office; remaining at one's post

absence; being away from home

internment; detainment; detention

registered mail; registered post; registration (of mail)

karuta; traditional Japanese playing cards, esp. hyakunin isshu karuta or iroha karuta

studying abroad

stop (bus, tram, etc.); station; stopping place