HSK 4
秒
miǎo量
second (unit of time); arc second (angular measurement unit); (coll.) instantly
他只用了十秒就跑到门口。
Tā zhǐ yòng le shí miǎo jiù pǎo dào mén kǒu.
He reached the door in only ten seconds.
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 4.