diff --git a/book/src/chapter_1.md b/book/src/chapter_1.md
index 98d12f3..a4b4c49 100644
--- a/book/src/chapter_1.md
+++ b/book/src/chapter_1.md
@@ -18,6 +18,7 @@
 ![by years](images/eliminate/years.png)
 
 Ориентировочно появилось: 1560
+from Latin: eliminatus
 
 ### obliterate
 #### [etymonline.com](https://www.etymonline.com/word/obliterate)
@@ -26,6 +27,7 @@
 ![by years](images/obliterate/years.png)
 
 Ориентировочно появилось: 1600
+from Latin: obliteratus
 
 destroy