abfeuern
to fire
To fire a shot from a weapon or launch a rocket.
Der Jäger feuerte einen Schuss auf das Wild ab.
The hunter fired a shot at the game.

to fire
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to fire
To fire a shot from a weapon or launch a rocket.
Der Jäger feuerte einen Schuss auf das Wild ab.
The hunter fired a shot at the game.

'Abfeuern' is a separable verb. The prefix 'ab-' goes to the end in a main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
Die Soldaten feuerten eine Salve ab.
The soldiers fired a volley.
You distinguish the literal and figurative meanings by the object. If shots, rockets, or arrows are mentioned, the literal meaning is intended. With questions, jokes, or criticism, it is the figurative meaning.
Von dem Schiff wurde ein Notsignal abgefeuert.
A distress signal was fired from the ship.
In the figurative meaning, the person receiving the questions or comments is often connected with the preposition 'auf' and the accusative.
Die Reporter feuerten ihre Fragen auf den Minister ab.
The reporters fired their questions at the minister.
to start
'starten' and 'abfeuern' can both be used with rockets. In this context, 'starten' sounds neutral and describes that a rocket, an airplane, or a journey begins. 'abfeuern' emphasizes the technical or military moment more strongly: something is sent off with force, often a weapon or a rocket. The words can be confused because in German you can say that a rocket 'startet' or is 'abgefeuert'. For normal journeys and airplanes, 'starten' fits. For weapons, shots, and rockets as projectiles, 'abfeuern' is more precise.

Die Soldaten feuerten eine Rakete ab, nachdem der Befehl kam.
The soldiers fired a rocket after the order came.
Das Flugzeug startet heute wegen des Nebels eine Stunde später.
Because of the fog, the plane is taking off an hour later today.