IPA: //ˈstɔːrmˌbaʊnd//
KK: /ˈstɔrmˌbaʊnd/
Unable to leave or communicate due to a storm, often because of being trapped or delayed by severe weather conditions.
The travelers were stormbound for three days, waiting for the weather to clear.
Stormbound is formed from "storm" (from Old English "storm", meaning a violent weather disturbance) and "bound" (from Old English "bund", meaning to be confined or tied). The word "stormbound" describes being confined or trapped due to a storm.
Imagine being 'tied' or 'confined' ('bound') by a 'violent weather disturbance' ('storm') — that's what it means to be stormbound.
No commonly confused words.