◌̀ character spelling unconfirmed
Definitions
  1. A diacritical mark of the Latin script, called àmì ohùn ìsàlẹ̀ (“low-tone mark”) in Yoruba, and found on À/à, È/è, Ẹ̀/ẹ̀, Ì/ì, Ò/ò, Ọ̀/ọ̀, Ù/ù, Ǹ/ǹ and M̀/m̀. Used to indicate low-tone, or falling-tone when after ◌́ diacritic
Source: Wiktionary, where this word is spelled “◌̀”. Reference: en-◌̀-yo-character-Ya74nJMS