open-ended

Unrestricted by definite limits.

There will be an open-ended discussion.

This short list represents but a few items of an extensive and open-ended list of untreated Indian English lexis.

Adaptable to change.

The topic is definitions, but is open-ended really.

Permitting a spontaneous or unstructured response.

I'll ask you an open-ended question.

Of a straight draw, made up of four consecutive cards, thus able to be completed by either of two ranks of card.

The flop of 3-6-Q gave Brunson an open-ended straight draw with his 4-5 of hearts.