Sentence:  <WSD>Hellebore</WSD> is a classic insecticide that has not found much favor in today's pest-control recommendations, though it was certainly effective for its time. In some organic pest-control books information on <WSD>hellebore</WSD> can still be found, but by and large its use went out of favor in the 1920s and 1930s. 
Meaning of the word marked with <WSD> tags:  A toxic extract of certain false hellebores ((noshow=1) or (noshow=1)), formerly used as a pesticide.