diff --git a/src/main/kotlin/com/marvinelsen/willow/database/CreateDatabase.kt b/src/main/kotlin/com/marvinelsen/willow/database/CreateDatabase.kt
index e349828..96f3fd1 100644
--- a/src/main/kotlin/com/marvinelsen/willow/database/CreateDatabase.kt
+++ b/src/main/kotlin/com/marvinelsen/willow/database/CreateDatabase.kt
@@ -64,7 +64,14 @@ fun main() {
         connection.prepareStatement(
             "INSERT OR IGNORE INTO entry(traditional, simplified, pinyin_with_tone_marks, pinyin_with_tone_numbers, zhuyin, searchable_pinyin, searchable_pinyin_with_tone_numbers, cedict_definitions, cross_straits_definitions, moe_definitions, character_count) VALUES(?,?,?,?,?,?,?,?,?,?,?)"
         )
-    for (entry in cedictEntries) {
+    cedictEntries.groupBy {
+        "${it.traditional}${it.pinyinSyllables.joinToString(
+            ""
+        ) { it.format(TransliterationSystem.PINYIN_WITH_TONE_NUMBERS).lowercase() }}"
+    }.entries.forEach { entries ->
+        val entry = entries.value.first()
+        val definitions = entries.value.flatMap { it.definitions }
+
         try {
             insertStatement.setString(1, entry.traditional)
             insertStatement.setString(2, entry.simplified)
@@ -72,13 +79,17 @@ fun main() {
                 3,
                 entry.pinyinSyllables.joinToString(
                     separator = " "
-                ) { it.format(TransliterationSystem.PINYIN_WITH_TONE_MARKS) }
+                ) { it.format(TransliterationSystem.PINYIN_WITH_TONE_MARKS).lowercase() }
             )
             insertStatement.setString(
                 4,
                 entry.pinyinSyllables.joinToString(
                     separator = " "
-                ) { it.format(TransliterationSystem.PINYIN_WITH_TONE_NUMBERS).replace("u:", "ü").replace("v", "ü") }
+                ) {
+                    it.format(
+                        TransliterationSystem.PINYIN_WITH_TONE_NUMBERS
+                    ).lowercase().replace("u:", "ü").replace("v", "ü")
+                }
             )
             insertStatement.setString(
                 5,
@@ -106,7 +117,7 @@ fun main() {
                 8,
                 Json.encodeToString(
                     ListSerializer(ListSerializer(String.serializer())),
-                    entry.definitions.map { it.glosses }
+                    definitions.map { it.glosses }
                 )
             )
             insertStatement.setString(