pennyroyal
/ˈpɛniˌrɔɪəl/
noun
- A strong-smelling plant of the mint family, used in herbal medicine and as an insect repellent.
- She planted pennyroyal near the door to keep ants away.
- In the garden, pennyroyal spread quickly and covered the bare soil.
- The hiker rubbed pennyroyal leaves on her skin to repel mosquitoes.