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Webster 1913 Edition

adv.

In a ponderous manner.

adv.

With great weight.

ponderously ‎(comparative more ponderously, superlative most ponderously)

In a ponderous manner; very slowly.
- 2012 May 13, Alistair Magowan, “Sunderland 0-1 Man Utd”, in BBC Sport:
  Rooney and his team-mates started ponderously, as if sensing the enormity of the occasion, but once Scholes began to link with Ryan Giggs in the middle of the park, the visitors increased the tempo with Sunderland struggling to keep up.