General Lack of Power or Authority:
* Powerless: Lacking the ability to influence or control.
* Authority-less: Without any official power or right to command.
* Subordinate: Subject to the control of someone else.
* Impotent: Unable to act effectively.
* Helpless: Unable to defend oneself or take action.
* Ineffectual: Producing no significant effect.
* Uninfluential: Not having the ability to sway or change things.
Lack of Authority Specifically:
* Unauthorized: Not having permission or official sanction.
* Unofficial: Not recognized or authorized by a governing body.
* Informal: Lacking official status or formality.
* Unentitled: Not having a right or claim to something.
* Unqualified: Not having the necessary skills or experience.
Lack of Power Due to External Factors:
* Subject to: Under the control or influence of someone else.
* Dependent: Relying on others for support or resources.
* Bound by: Restricted by rules, laws, or obligations.
* Constrained: Limited in freedom or power.
The best word to use will depend on the specific context and the nuance you wish to convey.