indeterminate

not precisely determined or established; not fixed or known in advance

• “of indeterminate age”
• “a zillion is a large indeterminate number”
• “an indeterminate point of law”
• “the influence of environment is indeterminate”
• “an indeterminate future”

having a capacity for continuing to grow at the apex

• “an indeterminate stem”

of uncertain or ambiguous nature

• “the equivocal (or indeterminate) objects painted by surrealists”

not capable of being determined

• “the indeterminate number of plant species in the jungle”

not leading to a definite ending or result

• “an indeterminate campaign”