noun
point of a sword; forceful debate
Literally the tip of a sword; figuratively used for a sharp, aggressive argument or verbal attack. The figurative sense is somewhat literary.
彼の太刀先は鋭く、相手を圧倒した。
His verbal attack was sharp and overwhelmed his opponent.
太刀先を交えるような議論になった。
It turned into a heated debate, as if crossing swords.