durchqueren
to cross
To move from one side to the other through an area, room, or surface. The verb is inseparable.
Um nach Italien zu gelangen, müssen wir die Schweiz durchqueren.
To get to Italy, we have to cross Switzerland.

to cross
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to cross
To move from one side to the other through an area, room, or surface. The verb is inseparable.
Um nach Italien zu gelangen, müssen wir die Schweiz durchqueren.
To get to Italy, we have to cross Switzerland.

'Durchqueren' (to cross) is an inseparable verb. The prefix 'durch-' always stays at the beginning of the verb, even in a main clause. The past participle is formed without 'ge-': 'hat durchquert' (has crossed).
Er hat den gesamten Kontinent mit dem Fahrrad durchquert.
He crossed the entire continent by bicycle.
The verb is made up of 'durch' (through) and 'queren' (to cross). Its meaning is therefore very literal: to move across and through something.
Die Wandergruppe will den Fluss an einer flachen Stelle durchqueren.
The hiking group wants to cross the river at a shallow spot.
The verb 'durchqueren' (to cross) always requires a direct object in the accusative that indicates what is being crossed. The question is: 'Wen oder was durchqueren?' (whom or what to cross?).
Die Touristen durchqueren die Altstadt zu Fuß.
The tourists cross the old town on foot.
to happen / pass
'passieren' and 'durchqueren' can both mean that you move past a place or through an area. 'passieren' fits especially when you leave a specific point behind you, for example a border, a gate, or a checkpoint. 'durchqueren' is used when you go or travel from one side of a larger area to the other, for example through a park, a city, or a country. Learners may confuse the words because both describe movement. As a guide: you use 'passieren' for a point; you use 'durchqueren' for an area.

Im Sommer durchqueren wir die Alpen mit dem Zug.
In the summer, we cross the Alps by train.
Nach kurzer Kontrolle passierte der Fahrer die Grenze.
After a brief check, the driver passed the border.