HSK 7-9
坚守
jiānshǒu动
to hold fast to; to stick to
医生在灾区坚守多个昼夜。
Yī shēng zài zāi qū jiān shǒu duō gè zhòu yè.
The doctor remained at the disaster area for several days and nights.
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.