• 珍めずらしい — rare; unusual
• 珍味ちんみ — delicacy; rare taste
• 珍客ちんきゃく — unusual/rare guest
• 珍事ちんじ — rare event; odd happening
• 珍品ちんぴん — rare article; curio
• 珍重ちんちょう — to value; to prize (see Combo below)
• 珍奇ちんき — odd; curious; bizarre

Left side is 王 “jewel/ball,” hinting at something precious. The right side supplies the sound (チン). Put together, 珍 paints the idea of a “jewel-like thing” — rare, curious, and worth noticing.