Where does “swærm” come from?

swærm (Old Danish) comes from Old Norse svarmr, from Proto-Germanic swarmaz, from Proto-Indo-European swēr- — heavy.

Ancestry of “swærm”, step by step

StepLanguageWordMeaning
1Old Norsesvarmrswarm
2Proto-Germanicswarmazswarm; dizziness
3Proto-Indo-Europeanswēr-heavy

Words derived from “swærm”

Every word from Proto-Indo-European swēr- →Every word from Proto-Germanic swarmaz →Every word from Old Norse svarmr →
swærm — Etymology, Origin & Word History | Etymology Explorer