stoppen
to stop
To end a movement or an ongoing process, or bring it to a standstill.
Bitte stoppe das Auto an der nächsten Ecke.
Please stop the car at the next corner.

to stop
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to stop
To end a movement or an ongoing process, or bring it to a standstill.
Bitte stoppe das Auto an der nächsten Ecke.
Please stop the car at the next corner.

The verb 'stoppen' (to stop) is the basis for the noun 'der Stopp' (e.g. a short stop) and for compound words such as 'die Stoppuhr' (a watch for measuring time intervals).
Wir legen auf der Fahrt nach Italien einen Stopp in den Alpen ein.
On the drive to Italy, we'll make a stop in the Alps.
'Stoppen' (to stop) almost always requires an accusative object. You always stop 'etwas' (something) or 'jemanden' (someone).
Der Regen hat die Bauarbeiten gestoppt.
The rain stopped the construction work.
In the meaning of 'zum Stillstand bringen' (to bring to a standstill), 'stoppen' is often used for processes or movements. Typical combinations are 'die Blutung stoppen' (to stop the bleeding), 'die Produktion stoppen' (to stop production), or 'den Verkehr stoppen' (to stop traffic).
Ein Ersthelfer muss wissen, wie man eine starke Blutung stoppt.
A first aider must know how to stop severe bleeding.
You can recognize the meaning 'Zeit messen' (to measure time) from the context. Often the word 'Zeit' (time) appears directly as the object, or a stopwatch is mentioned.
Der Trainer stoppt die Zeit seiner Läufer auf die Sekunde genau.
The coach times his runners to the exact second.
The meaning 'abwehren' (to block/defend against) is typical in sports. People talk about 'den Ball stoppen' (to stop the ball), 'einen Angriff stoppen' (to stop an attack), or 'den Gegner stoppen' (to stop the opponent).
Der Verteidiger konnte den Stürmer im letzten Moment stoppen.
The defender was able to stop the striker at the last moment.
to hold
'halten' and 'stoppen' can both mean that a movement comes to an end. 'halten' is used very often for vehicles that come to a stop at a place, for example at a stop or a traffic light. 'stoppen' sounds more active and more general: you can stop a car, a machine, a process, or a person. If a bus stops according to schedule, you naturally say 'der Bus hält' (the bus stops). If someone deliberately ends or holds something up, 'stoppen' often fits better.

Jonas stoppt das Video, weil das Telefon klingelt.
Jonas stops the video because the phone is ringing.
Der Bus hält heute nicht an dieser Haltestelle.
The bus is not stopping at this stop today.