Lexical Definition

‎שָׁכַךְ‎ shâkak (shaw-kak') to subside H:V
a primitive root

appease, assuage, make to cease, pacify, set.

1) to subside, abate, decrease
1a) (Qal) to abate
1b) (Hiphil) to allay

See Greek: κοπάζω · περιαιρέω

Usage: 5 forms in 5 verses
Form Translated As     In Verse(s)
שָׁכָֽכָה it subsided Esth.7.10
כְּשֹׁ֕ךְ when subsided Esth.2.1
כְּשַׁ֣ךְ as bend Jer.5.26
וַיָּשֹׁ֖כּוּ and they subsided Gen.8.1
וַהֲשִׁכֹּתִ֣י and I will put an end to Num.17.5

Brown-Driver-Briggs

[‎שָׁכַךְ‎] verb decrease, abate (Late Hebrew ‎שְׁכִיכָה‎ is allaying of anger; ‎שִׁכֵּךְ אֹזֶן‎ soothe, satisfy the ear (so apparently Dalm), i.e. allow it to hear and understand, compare LevyNHWB (and Arabic be narrow have small ears, be deaf, Frä90); — Arabic see humble oneself, Wahrm humiliate); —

Qal Imperfect 3 masculine plural ‎וַיָּשֹׁכוּ‎ Gen 8:1 the waters abated; Infinitive construct ‎כְּשֹׁךְ‎ Esth 2:1 when abated the king's wrath, so Perfect 3 feminine singular ‎שָׁכָ֑כָה‎ Esth 7:10. — ‎כְּשַׁךְ יְקוּשִׁים‎ Jer 5:26 usually like the bending, crouching, of fowlers (this meaning for ‎שַׁךְ‎ dubious; Dr ‎כְּשֻׁר‎ Du strike out ‎ישׁור כשׁ‎, then reads ‎יִלְכֹּדוּ׃‎ ‎׳‎‎מוֺקְשִׁים הִצִּיבוּ בַּשַּׁחַת א‎). Hiph`il Perfect 1 singular consecutive ‎וַהֲשִׁכֹּתִ֫י מֵעָלַי‎ Num 17:20* I will allay from upon me the murmurings (accusative), etc.

Brown-Driver-Briggs References

Book Refs
Genesis 8:1
Numbers 17:20*
Esther 2:1 · 7:10
Jeremiah 5:26