Webster's Revised Unabridged Dictionary · 1913

Therewithal

Therewithal , adverb

1.
Over and above; besides; moreover. [Obsolete] — Daniel
And therewithal it was full poor and bad. — Chaucer
2.
With that or this; therewith; at the same time.
Thy slanders I forgive; and therewithal Remit thy other forfeits. — Shakespeare
And therewithal one came and seized on her, And Enid started waking. — Tennyson