details; circumstances; particulars
Formal, somewhat literary noun for the full details or circumstances of a matter. Often used in explanatory or official contexts.
Explain the details of the incident.
Report with all the particulars.
The kanji 委 means 'entrust' or 'detail', and 曲 means 'bend' or 'circumstance'. Together they convey the idea of detailed circumstances. The exact historical derivation is uncertain.