How do I specify “the word under the cursor” on VIM's commandline?

Question

I want to write a command that specifies \"the word under the cursor\" in VIM. For instance, let\'s say I have the cursor on a word and I make it appear twice. For instance, i

Answer 1

While in command-line mode, CTRL+R CTRL+W will insert the word under the cursor.

See the help for c_CTRL-R for a listing of all the other special registers:

:help c_CTRL-R