Definify.com

Webster 1913 Edition

Mightful

Might′ful

,

Adj.

Mighty.

[Obs.]

Shak.

Definition 2024

mightful

mightful

English

Adjective

mightful ‎(comparative more mightful, superlative most mightful)

(now literary, archaic) Mighty, powerful.
- c. 1385, William Langland, Piers Plowman, I:
  Here myȝtow see ensamples · in hym-selue one / That he was miȝtful & meke · and mercy gan graunte.