adj. & adv.
--adj. (mightier, mightiest)
1. powerful or strong, in body, mind, or influence.
2 massive, bulky.
3 colloq. great, considerable.
--adv. colloq. very (a mighty difficult task).
Derivatives:
mightily adv. mightiness n.
Etymology: OE mihtig (as MIGHT(2))