"Wert seasick" is a phrase that indicates the feeling of discomfort and nausea while travelling on water. If you're looking for synonyms to describe this unpleasant sensation, you could use phrases like "ocean sick", "motion sick", "seafaring nausea", "boat illness", "marine malady", or "seasickness". These terms all describe the same feeling, which can be caused by motion, imbalance, or anxiety on a boat, ship, or ferry. Whether you're prone to seasickness or not, it's always a good idea to take precautions like staying hydrated, avoiding alcohol and greasy foods, and staying in fresh air or focusing on a fixed point in order to keep your sea legs steady.