precariously
adverb
UK/prɪˈkeə.ri.əs.li/
US/prɪˈker.i.əs.li/
Definitions of precariously adverb
In a manner that is likely to fall, be damaged, or fail.
The old building looked precariously close to collapse.
He placed the vase precariously on the edge of the table, and I worried it would fall.
The climber moved precariously up the steep rock face, taking careful steps.