61 Heb “the sea was walking and storming.” The two participles הוֹלֵךְ וְסֹעֵר (holekh véso’er, “walking and storming”) form an idiom that means “the storm was growing worse and worse.” When the participle הוֹלֵךְ precedes another participle with vav, it often denotes the idea of “growing, increasing” ( 233 הָלַךְ 4.d; e.g., Exod 19:19; 1 Sam 2:26; 2 Sam 3:1; 15:12; 2 Chr 17:12; Esth 9:4; Prov 4:18; Eccl 1:6). For example, “the power of David grew stronger and stronger (הֹלֵךְ וְחָזֵק, holek vékhazeq; “was walking and becoming strong”), while the dynasty of Saul grew weaker and weaker (הֹלְכִים וְדַלִּים, holékhim védallim; “was walking and becoming weak”)” (2 Sam 3:1; see §37.6d).
62 The vav-consecutive prefixed to the imperfect/prefixed conjugation verb וְיִשְׁתֹּק (véyishtoq, “to quiet”) denotes purpose/result (see §38.3), translated here by the English infinitive.
63 Heb “become quiet for us”; “may quiet down for us.”

In other versions

Then they said to him, “What shall we do to you, that the sea may quiet down for us?” For the sea grew more and more tempestuous.

The sea was getting rougher and rougher. So they asked him, “What should we do to you to make the sea calm down for us?”

So they said to him, “What should we do to you so that the sea will calm down for us?” For the sea was getting worse and worse.

And since the storm was getting worse all the time, they asked him, “What should we do to you to stop this storm?”

So they said to him, “What shall we do to you so that the sea may quiet down for us?” because the sea was growing more and more tempestuous.

Then said they unto him, What shall we do unto thee, that the sea may be calm unto us? for the sea wrought, and was tempestuous.

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