$ sudo apt-get remove fonts-nanum-eco 

Uninstall fonts-nanum-eco including dependent package

If you would like to remove fonts-nanum-eco and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove fonts-nanum-eco 

Use Purging fonts-nanum-eco

If you use with purge options to fonts-nanum-eco package all the configuration and dependent packages will be removed.

$ sudo apt-get purge fonts-nanum-eco 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove fonts-nanum-eco 

See Also,