Definition of unmightily in English:

unmightily

adverb

rare
  • Powerlessly, impotently; weakly, ineffectually.

Origin

Late Middle English; earliest use found in Reginald Pecock (c1392–?1459), bishop of Chichester and religious author. From unmighty + -ly. Compare earlier mightily.

Pronunciation

unmightily

/(ˌ)ʌnˈmʌɪtɪli/