With the Wordsmyth Vocabulary Center activities, you can study these words, play games with them, and assess your knowledge of their meanings with a quiz. Go to the Vocabulary Center, the words…

noun any poisonous substance that is produced by living cells or living organisms.These bacteria secrete toxins that can cause illness.The venom of the Black Cobra contains a dangerous toxin. See the full…

intransitive verb to stick or cling firmly, as by gluing (usu. fol. by “to”).The dust adhered to her skin. to follow or hold to closely (usu. fol. by “to”).You’ll get into trouble…

noun an occurrence or fact associated with or having an impact on an event or situation.What were the circumstances of his arrest?The circumstances surrounding his death are still being investigated. See the…

noun a wild animal’s shelter; den.The bear is now hibernating in its lair. See the full entry