Where does “quiescently” come from?
quiescently (English) comes from English quiescent, from Latin quiēscēns, from Latin quiēscō, from Latin quiēs, from Proto-Italic kʷiētis, from Proto-Indo-European kʷyéh₁tis, from Proto-Indo-European kʷyeh₁- — to rest; rest, peace.
quiescently (English): In a quiescent manner
Ancestry of “quiescently”, step by step