HSK 5
随意
suíyì形
as one wishes; according to one's wishes; at will; voluntary
你可以随意选择喜欢的座位。
Nǐ kě yǐ suí yì xuǎn zé xǐ huan de zuò wèi.
You may choose any seat you like.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 5.