공동 작업하다
To work jointly on an activity, especially to produce or create something.
예문:
"The two rival tech companies decided to collaborate on developing a new industry standard."
"She prefers to collaborate with other artists rather than working alone in her studio."
"Researchers from three different universities collaborated to publish the groundbreaking study."
적국에 협력하다
To cooperate traitorously with an enemy or occupying force.
예문:
"During the occupation, some local officials chose to collaborate with the invading army to maintain power."
"The historical records show that many citizens refused to collaborate despite severe threats."