Unable to make rational decisions; insane or otherwise cognitively impaired.
Not resistant to deformation or flow.
Opening too early during pregnancy, resulting in miscarriage or premature birth.
Unskilled; lacking the degree of ability that would normally be expected.
A person who is incompetent.
Uncommitted, not having reached a decision.
Open and not yet settled or determined.
A voter etc. who has not yet come to a decision.