Lament is a verb that means "To express sorrow" (See ->
https://www.merriam-webster.com/dictionary/lament). If you're not sure of the meaning of a word (e.g. - "Lament"), you can highlight the word, right click on the highlight text and then click on "Search Google for "Lament" (I set Google as my browser's default search provider in FireFox. If you chose another search engine like Yahoo then the Windows Shortcut Menu option would say "Search Yahoo for "Lament"). A new tab will open and you will see the definition of the word in question. I hope that this helps~!
The word can also be a noun when used in the form "Lamentation", meaning "An expression of sorrow". The most famous quote is of course, seen in the movie "Conan the Barbarian". When asked by a Mongol lord "What is best in life?" Conan replies "Crush your enemies! See them driven before you! And to hear the lamentation of their women!" ->
https://www.youtube.com/watch?v=Oo9buo9Mtos. I also like the Robot Chicken version of that famous scene ->
https://www.youtube.com/watch?v=nIQfIj-RLyw!