The word "ruthless" was created by adding the prefix "un-" to "ruth" to signify the opposite of having compassion or mercy. Therefore, "ruthless" originally meant "without ruth" or "lacking pity."
The word "ruth" itself is related to the Old English word "hreowan" meaning "to grieve" or "to have sorrow." This connection highlights the strong association between compassion and the feeling of sorrow or grief.
In summary:
* ruth (Old English): compassion, pity, mercy
* ruthless: without ruth, lacking pity
So, the word "ruthless" effectively describes someone who is devoid of compassion, mercy, or pity.