HSK 7-9
恰巧
qiàqiǎo副
by chance; as chance would have it
我恰巧听见了他们的谈话。
Wǒ qiàqiǎo tīngjiàn le tāmen de tánhuà.
I happened to overhear their conversation.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.