diff --git a/src/data.ts b/src/data.ts
index e93e958..a072b70 100644
--- a/src/data.ts
+++ b/src/data.ts
@@ -1,14 +1,14 @@
 import words from "~words"
-export { words }
 
 export const wordLookup = new Map(
   Object.entries(words).map(([key, value]) => [key.toLowerCase(), value])
 )
 
-export function isWord(word: string) {
-  return wordLookup.has(word.toLowerCase())
+for (const word of Object.values(words)) {
+  if (word.ucsur)
+    wordLookup.set(
+      // "U+F196C" -> 0xF196C -> "\uDB86\uDD6C"
+      String.fromCodePoint(parseInt(word.ucsur.slice(2), 16)),
+      word
+    )
 }
-
-// for (const [word, data] of wordLookup.entries()) {
-//   data.ucsur
-// }
diff --git a/src/dom.ts b/src/dom.ts
index ab3cccc..32ac4ff 100644
--- a/src/dom.ts
+++ b/src/dom.ts
@@ -12,6 +12,12 @@ export function rectContains(rect: Range | Element, x: number, y: number) {
 }
 
 export function getWord(text: string, index: number): string | null {
+  // UCSUR
+  const codePoint = text.codePointAt(index) || 0
+  if (codePoint >= 0xf1900 && codePoint <= 0xf19ff)
+    return String.fromCodePoint(codePoint)
+
+  // Alpha word
   const preIndex = text.slice(0, index).match(/[a-z]*$/i)![0]
   const postIndex = text.slice(index).match(/^[a-z]*/i)![0]
   return preIndex + postIndex || null
diff --git a/src/index.ts b/src/index.ts
index 06178f9..3bdf76d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,4 @@
-import { isWord, words } from "data"
+import { wordLookup } from "data"
 import { clearWord, container, setWord, stylesheet } from "display"
 import { getWordAtPoint } from "dom"
 
@@ -6,16 +6,18 @@ let prevWord: string | null = null
 
 window.addEventListener("dblclick", (evt) => {
   if (!(evt.target instanceof Node)) return
-  const word = getWordAtPoint(evt.target, evt.x, evt.y)
+  const wordText = getWordAtPoint(evt.target, evt.x, evt.y)
+
+  if (!wordText || wordText === prevWord) return
 
-  if (!word || word === prevWord) return
-  if (!isWord(word)) return
+  const word = wordLookup.get(wordText)
+  if (!word) return
 
   document.getSelection()?.removeAllRanges()
-  if (word) setWord(words[word])
+  if (wordText) setWord(word)
   else clearWord()
 
-  prevWord = word
+  prevWord = wordText
 })
 
 window.addEventListener("click", (evt) => {