Where does “ultraquiet” come from?
ultraquiet (English) comes from English quiet, from Latin quiētus, from Latin quiēscō, from Latin quiēs, from Proto-Italic kʷiētis, from Proto-Indo-European kʷyéh₁tis, from Proto-Indo-European kʷyeh₁- — to rest; rest, peace.
ultraquiet (English): Extremely quiet
Ancestry of “ultraquiet”, step by step