What is the meaning of "Yachogu"?
Rashi: It is an expression of breakage. the same applies to "Yonasi b'Chagvei ha'Sela" (Shir ha'Shirim 2:14), "v'Haysah Admas Yehudah l'Egypt l'Chaga" (Yeshayah 19:17).
Radak: It is motion, like "v'Haysah Admas Yehudah l'Egypt l'Chaga" - trembling of fright. It is like a drunkard wobbles; he cannot stand by himself. It is the same as "Yanu'u"; The matter is repeated in different words.
Why do they move like a drunkard?
Ibn Ezra: Due to the sea's turbulence, they cannot stand or sit.
Malbim: Those who work in the sea, they maintain the boat via casting iron (an anchor) into the sea. Then, the boat does not rise high, but it wobb les like a drunkard where it stands.
Why does it say "v'Chol Chachmasam Tisbala"?
Radak: All the ship captains' Chachmah is abolished, for they cannot maintain the boat if Hashem will not quiet the wind. They have no way to be saved, other than screaming to Hashem.
