each of the two or more long pointed parts of a fork 叉子齿；叉齿 
One of the prongs of the garden fork went through his foot. 园艺叉子的一个尖齿把他的脚扎了。
each of the separate parts of an attack, argument, etc., that move towards a place, subject, etc. from different positions （进攻、论点等的）方面 - -pronged
(in adjectives 构成形容词 having the number or type of prongs mentioned 有…齿的；分…方面的 a two-pronged fork 二齿叉 a three-pronged attack 三路进攻
Word Originlate 15th cent. (denoting a forked implement): perhaps related to Middle Low German prange ‘pinching instrument’.