舊

old / opposite: new 新 / former / worn (with age)

mortar

type of owl

old affair / former matter

to reminisce / to talk about former times

shabby

as before / as in the past

old friend / former acquaintance

old wine in a new bottle (idiom)

to turn over a new leaf

out with the old and in with the new (idiom)

rate of deprecation

to act in accordance with the old rules (idiom) / to follow a proven formula

Destroy the Four Olds (campaign of the Cultural Revolution)

to get rid of the old to bring in the new (idiom); to innovate

to turn over old accounts / fig. to revive old quarrels / to reopen old wounds

outmoded / old-fashioned

outmoded / decadent / decaying

History of the Five Dynasties (between Tang and Song), eighteenth of the 24 dynastic histories 二十四史[Er4 shi2 si4 Shi3], compiled under Xue Juzheng 薛居正[Xue1 Ju1 zheng4] in 974 during Northern Song 北宋[Bei3 Song4], 150 scrolls

old friends

do not neglect old friends

new worries added to old hatred (idiom); afflicted by problems old and new

old wine in a new bottle (idiom)