This is the 8711th most frequent German word.
kreuze
"Crosses" (plural of "cross") or "cross" (verb form: I/he/she/it crosses).
Here, "kreuze" is used to denote the action of marking an option (crossing or checking) on the questionnaire.
Ich kreuze die richtige Antwort auf dem Fragebogen an.
I mark the correct answer on the questionnaire.
In this case, "kreuzen" refers to the physical act of crossing a geographical terrain.
Die Pilger kreuzen den Ozean, um das heilige Land zu erreichen.
The pilgrims cross the ocean to reach the holy land.
Here, "kreuzen" implies a figurative crossing of paths or encountering someone.