hijack
Pronunciation: /ˈhʌɪdʒak/
verb
- illegally seize (an aircraft, ship, or vehicle) while in transit and force it to go to a different destination or use it for one’s own purposes: a man armed with grenades hijacked the jet yesterday
- steal (goods) by seizing them in transit: the UN convoys have been tamely allowing gunmen to hijack relief supplies
- take over (something) and use it for a different purpose: he argues that pressure groups have hijacked the environmental debate

Origin:
1920s (originally US): of unknown origin

Spelling help
Remember that hijack begins with hi-.