S: (v) induce, stimulate, cause, have, get, make (cause to do; cause to act in a specified manner) "The ads induced me to buy a VCR"; "My children finally got me to buy a computer"; "My wife made me buy a new sofa"
W: (adj) facultative [Opposed to: obligate] (able to exist under more than one set of conditions) "a facultative parasite can exist as a parasite or a saprophyte"