noun which may take the genitive case particle 'no'
Used in legal contexts to describe a case or matter that is currently before a court or other authority and has not yet been resolved.
その訴訟はまだ係属中です。
The lawsuit is still pending.
係属中の事件についてコメントできない。
I cannot comment on a pending case.
Compound of 係属 (jurisdiction, pendency) + 中 (in the process of). The exact historical derivation is uncertain; the spelling is conventionally associated with legal pendency.