Added 10 October 2026 unmercifully /ʌnˈmɜɹ.sɪˌfʊl̩.li/ adverb Categories: Describing WordsRare Words adverb ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about unmercifully at Wordnik → Where our words come from → Without pity; in a merciless manner. he was mercilessly trounced by his opponent in the House Related Words: mercilesslyremorselesslypitilesslymercifullyunpunishinglyungraciouslycruellyunbenevolentlyunmeritoriouslyunpityinglyuncharitablyiniquitously Back to today's word