commencement; start; beginning
Refers to the act of starting something, often used in contexts like the beginning of a project, event, or process. Somewhat formal or literary.
The commencement of construction is scheduled for next month.
A problem arose at the initial stage.
The noun form of 仕掛かる “to begin or be in the course of doing,” itself formed from 仕掛ける with the intransitive ending 掛かる.