HSK 5
反复
fǎnfù副动名
repeatedly; over and over; to upend; unstable; to come and go; (of an illness) to return
他的病情最近反复了几次。
Tā de bìng qíng zuì jìn fǎn fù le jǐ cì.
His condition has relapsed several times recently.
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.