How to remember
The kanji 矢 (arrow) clearly depicts an arrow with a pointed tip at the top and fletching at the bottom, helping it fly straight. 'Ya' — YAY! I hit the target with my ARROW! 'Shi' — The SHARP point of the ARROW. Vocabulary
矢先やさき
arrowhead; point of attack; verge 一矢いっし
one arrow; a retort/counterattack