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