是declare 的后缀，中文意思是v. 宣布，声明断言，宣称申报放弃击球，宣布结束赛局

例句

Few people dared to declare their opposition to the regime.很少有人敢宣称他们反对这个政权。

The government is ready to declare a permanent ceasefire.政府已经准备好宣布永久停火。