The word "嗜欲" is formed by combining the character "嗜", meaning addiction or strong liking, which itself is composed of the semantic radical "口" (mouth) indicating relation to appetites and the phonetic component "耆", with the character "欲", meaning desire, composed of the phonetic "谷" and the semantic component "欠" suggesting lack or want; together, they create a compound where both characters contribute their meanings to express the concept of addictive desires or cravings.