noun
working together; collaboration; joint labor
Refers to people working together on a task or project. Often used in formal or organizational contexts.
このプロジェクトは両社の同労によって成功した。
This project succeeded through the collaboration of both companies.
Compound of 同 (same, together) and 労 (labor, work). The exact historical derivation is uncertain, but the meaning is transparent from its components.