T1I1D2E1M3A1R1K5
15 points
TIDEMARK is validvalid
a mark showing the highest or lowest point of a tide [n TIDEMARKS]
a mark showing the highest or lowest points of a tide [n -S]
a mark showing the highest or lowest point of a tide [n TIDEMARKS]
a mark showing the highest or lowest points of a tide [n -S]