• 矛ほこ — spear; halberd
• 矛先ほこさき — spear point; the brunt/target of attack
• 矛盾むじゅん — contradiction; inconsistency
• 矛盾むじゅんする — to contradict; to be inconsistent

矛 is a pictograph of a hand-held pole weapon — think of a thrusting spear or halberd. It also functions as a self-form radical in our set (it appears as-is when used as a radical), but it’s relatively rare compared with high-frequency radicals.