HSK 7-9
大肆
dàsì副
wantonly; without restraint (of enemy or malefactor); unbridled
商家不能大肆宣传虚假产品。
Shāng jiā bù néng dà sì xuān chuán xū jiǎ chǎn pǐn.
Businesses must not heavily promote fraudulent products.
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Appears across levels (7-9) in the HSK 3.0 word list.