mightly

/M AY1 T L IY0/
adjective
  1. 1

    Mighty; competent; capable; strong; powerful.

  2. 2

    Substantial; weighty; of import.

  3. 3

    Able; able to occur; possible.

adverb
  1. 1

    Very.

  2. 2

    Mightily.