nacimiento
birth
nacer
to be born
+
-miento
noun-forming suffix
Nacimiento means birth and is formed from the verb nacer0 (to be born0) plus the suffix -miento1, which forms a noun1 from the verb.
noun
- birthThe act of being born or coming into existenceEl nacimiento de su hijo fue un momento muy feliz. // The birth of his son was a very happy moment.