The rafflesia plant makes a unpleasant smell
Yes and it's a very unpleasant smell.
Effluvial
A strong unpleasant smell
No. It has a very unpleasant odor.
Stench.
A peculiar, peircing or unpleasant smell.
The unpleasent smell drive away the enemies from that plant
The unpleasent smell drive away the enemies from that plant
because they make an unpleasant smell
because it is body odour
Manure has a very strong unpleasant smell. Mint generally has a nice smell.