留守【るす】
absence, being away from home, house-sitting, house-sitter, being left unattended to (of one's studies, etc.), neglecting
留学【りゅうがく】
studying abroad, (temporarily) studying at another school (to learn a specific skill)
留守電【るすでん】
answering machine, answerphone
留守番【るすばん】
care-taking, house-sitting, house-watching, staying at home, caretaker, house-sitter
留める【とどめる】
to stop, to stay (e.g. the night), to cease, to put an end to, to contain, to keep (in position, in place), to limit, to record (e.g. a fact), to retain
仕留める【しとめる】
to bring down (an animal, opponent, etc.), to kill, to shoot dead, to shoot down
留学生【りゅうがくせい】
overseas student, exchange student
在留【ざいりゅう】
residing (esp. abroad), staying, living
書留【かきとめ】
registered mail, registered post, registration (of mail), (putting on) record, writing down, noting down, registry
保留【ほりゅう】
reservation, putting on hold, deferment, withholding
留年【りゅうねん】
repeating a year (at school), staying in the same class for another year
停留所【ていりゅうじょ】
stop (bus, tram, etc.), station, stopping place
残留【ざんりゅう】
staying behind, remaining, residual
駐留【ちゅうりゅう】
stationing (e.g. of troops), garrison
抑留【よくりゅう】
internment, detainment, detention
拘留【こうりゅう】
custody, detention, confinement
留任【りゅうにん】
remaining in office, staying in office, remaining at one's post
留保【りゅうほ】
reserving, withholding
留置場【りゅうちじょう】
police cell, place of detention, jail
留置【りゅうち】
detention (usu. during investigation), imprisonment, poundage, custody