bucolic sounds a bit like bullock which is used in the "country side"...
BUlls and COLI (collie, a sheep dog) Country -- rustic and pastoral places, people, and songs.
olic is the one to see. oleic acid is used to remove rust.
or even if you can check oli, jumble it as oil,used as an antirust agent,which in the past was used as an oral agent.
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