Where does “swarm” come from?

swarm (Middle Dutch) comes from Old Dutch swarm, from Proto-Germanic swarmaz, from Proto-Indo-European swēr- — heavy.

Ancestry of “swarm”, step by step

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

Words derived from “swarm”

Every word from Proto-Indo-European swēr- →Every word from Proto-Germanic swarmaz →Every word from Old Dutch swarm →