yup, always thought that was a weird name to call a crop. Dont know the history of the word really, but one would think it has had the assault meaning for a long long time.
All you ever wanted to know, and more:
"The word '****' to describe the cruciferous vegetable in English comes ultimately from Latin via the Romance languages, from rapa ("turnip"). The word '****' to describe a sexual assault comes from a different Latin root, rapere ('to seize or carry off')."
https://www.quora.com/Why-was-canola...d-rapeseed-oil