Character breakdown
Study each Hanzi separately, then return to the complete word so pronunciation, meaning, and movement stay connected.
How to learn 凹洞
Listen once without reading, repeat the pinyin with its tones, then write every character in sequence. Finally, recall the complete meaning instead of memorizing each character as an isolated translation.
When the word appears in a sentence, check whether its part of speech and meaning match the definition shown here. Chinese words can change nuance with context.
Words with the same characters
Compare how a familiar Hanzi changes meaning inside another word.
cave; hole; zero (unambiguous spoken form when spelling out numbers); CL:個|个[ge4]
漏洞lòudòngleak; hole; gap; loophole
凹āoconcave; depressed; sunken; indented; female (connector etc)
洞穴dòngxuécave; cavern
空洞kōngdòngcavity; empty; vacuous
凹凸āo tūconcave or convex; bumps and holes; uneven (surface); rugged