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tide; current
sea water
opportunity; chance
汐が引いた後の浜辺には貝殻が散らばっていた。
Seashells were scattered across the beach after the tide receded.
汐風が吹いてくると、磯の香りが広がった。
When the sea breeze blew in, the scent of the shore spread.
漁師は汐の満ち引きを見ながら出港の時間を決める。
Fishermen decide when to set sail by watching the ebb and flow of the tide.