I am looking for a word which means stealing something on its way to the recipient. For example, suppose you sent a gift to your friend. And suppose someone steals it before it reaches your friend. Is there one word (other than simply stealing) to explain this action?
You could use intercept.
obstruct (someone or something) so as to prevent them from continuing to a destination:
intelligence agencies intercepted a series of telephone calls
I intercepted Edward on his way to work
You might consider purloin, which involves a breach of trust. Otherwise, there is no exact equivalent for what you want.
Businesses usually call losses during the transport of goods pilferage.
To divert has a strong sense of turning aside something in passage. If the connotation of theft were clear from context, it might serve. The phrase "diversion theft" may refer to a specific scam.
Perhaps you are looking for seized, to indicate a profound meaning, yet similar to both intercepted and hijacked. Hijacked for some reason makes me think of a plane being taken over by terrorists, and intercepted of a "fumble" (or a football possession loss [turnover] more than the act of losing the oval). I meant to say that it's what come to mind, in the first case if someone mentioned that word it brings a memory of September 11 event and the second one, watching a game over tv of the superbowl in which one team loses the ball, so their turn gets intercepted. Please correct me if that's somewhat expressed wrongly or feel free to contribute with this answer.
I think of intercept.
Just like intercepting the phone calls by a third party. So, each and every call which is being made will be first intercepted then reach its destination.
We may also have an example of Hero and Villain. The Villain has many stooges through which he can monitor all the activities of Hero before taking an action against him. (Its also like intercepting the communication of Villain and Hero via Stooges).
how about 'take over'? as in.. 'When I was younger.. I used a lot mIRC and there was always some guys trying to take over my channel (#)! They were making the X or W (bots with higher privilege than a common user and depending on the channel owner settings even with more authority than an operator[which was a moderator] ) to execute a mass de-op (making the operators of the channel to lose their @) and then kicking them out. Since the bot X or W was still receiving orders from the user that performed a channel 'TAKE OVA!' (take over) they were placing themselves as the operators and setting rules like ban specific users, flood others, etc.. It was a nightmare!