Show product variations description in archives

Hello,
in woocommerce are there product variations and each variation has got a description field.

I'm trying to output this description under the product in shop pages, but I'm not able to...

I tried with this, but I'm only able to show product attributes:

//Show short description under product in archives
function dan_excerpt_in_product_archives() {
    echo wp_trim_words( get_the_excerpt(), 10 );
}
add_action( 'woocommerce_after_shop_loop_item_title', 'dan_excerpt_in_product_archives', 40 );

Do you know how can I achieve this?

thanks