high-water mark

NOUN
15 LETTERS · 2 SYLLABLES · STARTS WITH H

high-water mark is a valid 15-letter word worth 29 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
H4I1G2H4-0W4A1T1E1R1M3A1R1K5
4 + 1 + 2 + 4 + 0 + 4 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 5 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does high-water mark mean?

NOUN · 1 SENSE
1

A line marking the highest level reached.