aboulo-, aboul-, abulo-, abul-

(Greek: irresolution, indecision, loss or defect of the ability to make decisions)

The difference between perseverance and obstinacy is that one often comes from a strong will, and the other from a strong won't.

—Henry Ward Beecher
aboulia, abulia (s) (noun); aboulias; abulias (pl)
The loss of will-power, as a mental disorder, or of making decisions: Some of the symptoms of aboulia are a reduction in spontaneous speech, movement, thought, emotional reaction, and initiative.
aboulic, abulic (adjective); more aboulic, more abulic; most aboulic, most abulic
Relating to or suffering from the irrational and persistent inability to make decisions: Mary seemed to be so withdrawn in her own world that she was never able to make up her mind on any course of action, and her doctor termed this as being an aboulic condition.
aboulomania, abulomania (s) (noun) (no pl)
A mental disorder in which there is a loss of will-power: The pathological indecisiveness of aboulomania is normally related to mental anguish, stress, depression, and anxiety causing the affected person to be totally unable to function socially.
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abulia, aboulia (s) (noun); abulie; aboulias (pl)
A disorder marked by the partial or total inability to make decisions: Byron was told that he had abulia, also known as aboulia. In other words, he had neither willpower nor any "wish power" and so he wasn't able to decide what to do and he couldn't do it even if he wanted to.
paraboulia, parabulia (s) (noun); paraboulias: parabulias (pl)
Perversion or volition of will in which one impulse or urge is checked and replaced by another: Parabulia is frequently found in schizophrenics who intend to do a certain thing, but suddenly stop and do something quite the opposite or totally different and unrelated.