verwechseln
to confuse
To mistakenly take two or more people or things to be identical, or to be unable to tell them apart.
Entschuldigung, ich habe Sie mit jemandem verwechselt.
Sorry, I confused you with someone else.

to confuse
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to confuse
To mistakenly take two or more people or things to be identical, or to be unable to tell them apart.
Entschuldigung, ich habe Sie mit jemandem verwechselt.
Sorry, I confused you with someone else.

'Verwechseln' (to confuse) is an inseparable verb. The prefix 'ver-' always stays at the beginning of the verb. It often suggests a mistake or mishap, which fits well here with the meaning 'irrtümlich für gleich halten' (to mistakenly take as the same).
Ich habe die beiden Flaschen verwechselt.
I confused the two bottles.
The most important structure for this verb is: person/thing A (accusative) mit person/thing B (dative) verwechseln. The preposition 'mit' is crucial here.
Ich verwechsle die Zwillinge immer miteinander.
I always confuse the twins with each other.
A common mistake is using the wrong preposition. Always remember the combination 'verwechseln mit' (to confuse with). Don't say 'verwechseln und' or 'verwechseln zu'.
Er hat meine Jacke mit seiner verwechselt und die falsche mitgenommen.
He confused my jacket with his and took the wrong one.
to distinguish
'unterscheiden' and 'verwechseln' are clear opposites. If you can distinguish two things, you recognize the difference and tell them apart correctly. If you confuse them, you mistakenly take them to be the same or choose the wrong one. The words can be confused because both occur with similar people or things. But the difference is important: 'unterscheiden' is correct recognition; 'verwechseln' is a mistake in recognition.

Im Restaurant verwechselt die Verkäuferin die Bestellungen von zwei Gästen.
In the restaurant, the waitress mixes up the orders of two guests.
Im Urlaub kann der Chef die beiden ähnlichen Gerichte gut unterscheiden.
On vacation, the boss can easily distinguish the two similar dishes.