Radicals & Components
The recurring building blocks inside Chinese characters. Learn to recognize radicals and you'll start decoding unfamiliar characters on your own.
Patterns Inside Characters
Chinese characters aren't arbitrary shapes — they're built from a set of recurring components called radicals. The "water" radical (氵) appears in 河 (hé, river), 海 (hǎi, ocean), and 湖 (hú, lake). The "mouth" radical (口) shows up in 吃 (chī, eat), 喝 (hē, drink), and 唱 (chàng, sing). Once you learn to spot these patterns, unfamiliar characters start making sense before you even look them up.
Introduced at the Right Time
Radicals are abstract concepts that only click once you've seen enough real characters to anchor them. That's why duiduidui! waits until you've built a solid foundation of characters before introducing radicals. By then, you have plenty of concrete examples — so when you learn that 氵 means "water," you can immediately connect it to the water-related characters you already know.
Common Radicals First
Not all radicals are equally useful. The dictionary prioritizes radicals that appear in the most characters, so you learn the highest-leverage patterns first. A radical that shows up in dozens of characters you've already encountered is far more valuable than one that appears in just a handful of rare ones. The difficulty scoring system ensures this natural ordering.