HSK 4
首先
shǒuxiān副代
first of all; in the first place
到家以后首先要洗手。
Dào jiā yǐ hòu shǒu xiān yào xǐ shǒu.
The first thing to do after getting home is wash your hands.
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Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 4.