busily
adverb
- diligently/industriously/energetically (in a busy manner)
Wiktionary
adv
Etymology: From Middle English busily, busiliche, bisili, bisiliche, equivalent to busy + -ly.
- In a busy manner; actively.
“But these sweet thoughts do ever refresh my labours,/ Most busil'est when I do it.”
“Look at the little fellows, mere bundles of fluff, paddling along so busily and sturdily.”