you can't teach an old dog new tricks

:  the one or ones being addressed — compare thee, thou, ye, your, yours

:  one

:  can not

:  to cause to know something

:  to cause to know how

:  to accustom to some action or attitude

:  dating from the remote past :  ancient

:  persisting from an earlier time

:  of long standing

:  canid

:  a highly variable domestic mammal (Canis familiaris) closely related to the gray wolf

:  a male dog

:  canine

:  having an inferior or inauthentic quality :  spurious

:  unlike that used by native speakers or writers

:  to hunt, track, or follow like a hound

:  to worry as if by pursuit with dogs :  plague

:  to bother or pester persistently

:  extremely, utterly

:  having recently come into existence :  recent, modern

:  having been seen, used, or known for a short time :  novel

:  unfamiliar

:  newly, recently

:  a crafty procedure or practice meant to deceive or defraud

:  a mischievous act :  prank

:  a deceptive, dexterous, or ingenious feat

:  to deceive by cunning or artifice :  cheat

:  to dress or adorn fancifully or ornately :  ornament

:  of or relating to or involving tricks or trickery

:  skilled in or used for tricks

:  somewhat defective and unreliable