noun
grounds for an appeal
Legal term referring to the reasons or basis for filing an appeal in court.
弁護士は控訴理由を詳細に述べた。
The lawyer stated the grounds for appeal in detail.
控訴 means 'appeal' (the act), while 控訴理由 specifies the 'grounds' or 'reasons' for that appeal.
Compound of 控訴 (appeal) and 理由 (reason).