i Register
In some senses, massively is marked as slang. Watch for register when choosing this word.
adv
In a massive manner, in a way that appears large, heavy or imposing.
The locomotive was the now inevitable American 2-8-0, No. 2623. There she stood, effectively blocking the level crossing, simmering gently, massively inert. It was almost dark, and one's final sight was of her high, firelit cab, the enginemen nonchalantly leaning out, waiting for the right-away, while impatient road convoys piled up on both sides of the crossing.
Some of the most impressive applications of massively parallel computing have been in the context of wide-area distributed platforms.
Greatly.