
versorgen
to provide for
To give a person or an animal everything necessary for life, such as food, clothing, or care.
Die Eltern versorgen ihre Kinder mit allem, was sie brauchen.
The parents provide their children with everything they need.
to provide / to treat
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to provide for
To give a person or an animal everything necessary for life, such as food, clothing, or care.
Die Eltern versorgen ihre Kinder mit allem, was sie brauchen.
The parents provide their children with everything they need.

to supply
To supply an area or institution with something necessary, such as energy, water, or information.
Das neue Kraftwerk versorgt die ganze Region mit Strom.
The new power plant supplies the whole region with electricity.

to treat
To medically treat a wound or injury, for example by cleaning and bandaging it.
Der Sanitäter hat die Schnittwunde des Verletzten versorgt.
The paramedic treated the injured person's cut.
'Versorgen' (to provide/supply/treat) is an inseparable verb with the prefix 'ver-'. It is derived from the verb 'sorgen' (to care/worry). While 'sorgen für' means 'to take care of', 'versorgen' describes the concrete action of providing someone with what is needed.
Sie versorgt ihre Großmutter, die nicht mehr allein leben kann.
She cares for her grandmother, who can no longer live alone.
The verb 'versorgen' (to provide/supply) is very often used with the preposition 'mit' (with) and the dative. The structure is: person/thing in the accusative + 'versorgen' + 'mit' + thing provided in the dative.
Die Hilfsorganisation versorgt die Menschen mit Lebensmitteln und Wasser.
The aid organization provides the people with food and water.
In this meaning, the subject is often an institution (e.g. a power plant, a company), and the object is a geographical area (a city, a region). What is supplied is usually a resource such as electricity, water, or data.
Das neue Rechenzentrum versorgt tausende Kunden mit Cloud-Speicher.
The new data center supplies thousands of customers with cloud storage.
You can always recognize this meaning from the medical context. The direct object is typically a wound, an injury, or a patient.
Der Wanderer versorgte seinen blutenden Arm mit einem Verband.
The hiker treated his bleeding arm with a bandage.
to treat / to deal with
Behandeln and versorgen can both be appropriate for an injury. Versorgen usually refers to specific measures taken on the wound, such as cleaning and bandaging it. Behandeln is broader and also fits more extensive medical care aimed at healing it.

Die Ärztin versorgt die frische Schnittwunde sofort, indem sie sie reinigt und verbindet.
The doctor immediately tends to the fresh cut by cleaning and bandaging it.
Die Ärztin behandelt die entzündete Schnittwunde mehrere Tage lang mit einem Medikament.
The doctor treats the inflamed cut with medication for several days.