point of a spear; spearhead
focus (of one's attack, criticism, etc.); aim; target; brunt
force (of an argument); edge
批判の矛先が政府に向いた。
Criticism was aimed at the government.
矛先を変えて別の議題に移った。
We shifted the focus and moved to another topic.
怒りの矛先がなぜか自分に向いている。
For some reason, the anger is directed at me.