diff --git a/g4421-g4430/g4421.md b/g4421-g4430/g4421.md
new file mode 100644
index 00000000..baa29ed9
--- /dev/null
+++ b/g4421-g4430/g4421.md
@@ -0,0 +1,5 @@
+# πτηνός/ptēnos
+This word describes something. It is an adjective.
+* This word describes animals that have wings.
+
+See: 1 Corinthians 15:39