## Etymology
From mighty (Old English mihtig 'powerful', from miht 'might') + -ness, the native abstract-noun suffix. Might derives from Proto-Germanic *mahti-, from Proto-Indo-European *megʰ- 'to be able'.

## AI Etymology
Mightiness comes from mighty (Old English mihtig 'powerful', from miht 'might') + -ness, the native abstract-noun suffix. Might derives from Proto-Germanic *mahti-, from Proto-Indo-European *megʰ- 'to be able'. The etymological trail includes Old English mihtig and Proto-Germanic *magti-. As a noun, mightiness means the quality of being powerful or great. The same family is visible in related forms such as mighty, might, and mightily. Morphologically, the word is built from the elements named in its history, so the modern form preserves a visible compound, prefix, or suffix structure.

## Topics
- Describing Qualities
- Word Formation & Derivatives

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