fluctuant

adjective as in chancy

adjective as in dicey

adjective as in erratic

adjective as in iffy

adjective as in incalculable

adjective as in incomputable

adjective as in insecure

adjective as in measureless

adjective as in shaky

adjective as in tottering

adjective as in tottery

adjective as in uncountable

adjective as in unsure

adjective as in weak

adjective as in wobbly