Unlimited; not bounded or restricted; undefined.
Formed with the infinitive.
A non-finite verb form considered neutral with respect to inflection; depending on language variously found used with auxiliary verbs, in subordinate clauses, or acting as a gerund, and often as the dictionary form.
The infinitive mood or mode (a grammatical mood).
A verbal noun formed from the infinitive of a verb.
Unrestricted by definite limits.
Of a straight draw, made up of four consecutive cards, thus able to be completed by either of two ranks of card.
Adaptable to change.
Permitting a spontaneous or unstructured response.
There will be an open-ended discussion.