This is the 12214th most frequent German word.
ver
The prefix "ver-" in German indicates a change, error, or completion, often altering the meaning of the base verb.
Here 'ver-' is used as a prefix in 'verirren,' changing the meaning of 'irren' from 'to err' to 'to get lost'.
Ich kann mich leicht verirren in einer neuen Stadt.
I can easily get lost in a new city.
In 'verantworten,' the prefix 'ver-' along with 'antworten' (to answer) creates the meaning of 'to take responsibility' or 'to justify'.
Er versucht, sich für den Fehler zu verantworten.
He tries to take responsibility for the mistake.
When used in 'verkaufen,' the prefix 'ver-' modifies 'kaufen' (to buy) to create the meaning of 'to sell'.