From dakah; a dashing of surf -- wave.
see HEBREW dakah
H1796. doki
[דֳּכִי] noun [masculine] (crushing), crashing, dashing, suffix דָּכְיָם נהרות ישׂאִו Psalm 93:3 of ocean (waves).
דכך (√ of following; compare Arabic , Aramaic דְּכַךְ Late Hebrew in derivatives; see also דכה דכא,).