Word of the week: to chug

Back-formation (that can be translated into Spanish as derivación en sentido inverso or derivación regresiva) is a type of word formation that happens when  a word is shortened to derive an apparently primary form, e.g. to babysit (hacer de canguro) from babysitter (canguro). 

To chug is a recent example of back-formation, since it derives from chugger which was coined before it:

chugger, someone who is paid to stop people in the street and persuade them to give money regularly to a Charity  → to chug, to do just that. Many people don't like to be 'chugged', as they consider that, in a way, they're being 'mugged' ('atracados'), making them waste their time when maybe they're in a hurry, etc.

Other examples of back-formation:

burglar (ladrón que roba en casas/tiendas, etc) → to burgle (robar en  casas/tiendas, etc)

diagnosis (diagnóstico) → to diagnose (diagnosticar)

peddler (vendedor,-a ambulante) → to peddle (vender de puerta en puerta)

sculptor (escultor,-a) → to sculpt (esculpir)

sightseeing (visita turística) → to sightsee (realizar una visita turística)

television (televisión) → to televise (televisar)