血汐[chishio] blood spilt from the body
潮汐[chouseki] tide
汐干狩[shiohigari] shell gathering (at low tide)
引汐[hikishio] ebb tide
潮汐表[chousekihyou] a tide table

潮汐摩擦[chousekimasatsu] tidal friction
汐合い[shioai] opportunity
汐汲み[shiokumi] person who draws water from the sea
夕汐[yuushio] evening tide