yodan verb with 'hu/fu' ending (archaic), intransitive verb
to face each other; to be opposite
Archaic intransitive yodan verb. In modern Japanese, the same meaning is expressed by 向かい合う (むかいあう) or 相対する (あいたいする).
古い文書に「両軍、川を隔てて相向ふ」とある。
An old document says, 'The two armies faced each other across the river.'