defend
Pronunciation: /dɪˈfɛnd/
verb
- 1resist an attack made on (someone or something); protect from harm or danger: we shall defend our island, whatever the cost
- speak or write in favour of (an action or person); attempt to justify: he defended his policy of imposing high rates
- compete to retain (a title or seat) in a contest or election: he won the party’s nomination to defend the Welsh seat (as adjective defending) the defending champion

Origin:
Middle English: from Old French defendre, from Latin defendere, from de- 'off' + -fendere 'to strike'. Compare with offend