1. 泳ぐ、水泳する   sea   swim   shore   wave   Hint Half-n-half Clue   2. 貝   swimsuit   sea   shell   swim   Half-n-half Clue   3. 水泳パンツ   sand castle   lifeguard   swimming trunks   sand   Half-n-half Clue   4. 波乗り板   shore   sand castle   surfboard   sea   Half-n-half Clue   5. 水泳着   swim   swimsuit   sea   pail   Half-n-half Clue   6. 波   sea   shore   sand   wave   Half-n-half Clue   7. 救護員   swimming trunks   lifeguard   swim   surfboard   Half-n-half Clue