予 shuttle of a loom; 矛 spear.

予　yu2; the shuttle (of a loom); a weaving instrument. https://hanziyuan.net/#%E4%BA%88
矛 mao2　spear https://hanziyuan.net/#%E7%9F%9B
盾 dun4 shield
矛盾 lit. "sword spear" = contradiction