hunspell: add word to dictionary from command line

Question

From hunspell man page:

...
    When in the -a mode, hunspell will also accept lines  of  single
    words  prefixed  with  any of '*', '&', '@', '+', '-', '~', '#',
    '!', '%', '`', or '^'.  A line starting with '*' tells  hunspell
    to  insert the word into the user's dictionary (similar to the I
    command).
...

I tried something like: echo "* my_word" | hunspell -a but the word is not in my dictionary as parsing sample file again shows it as misspelled word

How does this work, how can I add custom word?
Or with Aspell, or any "common" program that writes to compatible dictionaries read by Hunspell/Aspell?

Answer 1

I found out that easiest solution is to use Aspell and create custom file in home folder, named .aspell.lang.pws, with contents like:

personal_ws-1.1 en 0
my_word

for language "en", which seems like great way to share "portable dictionary", BTW