There is no clear antonym listed in thesaurus but it could be reverse agent.
There is no actual opposite for the noun agent (representative, envoy).
An agent is someone that represents another person or acts on their behalf. An antonym is a word that means the opposite of another word. Antonyms for the word agent include customer, client, and courtier.
A conduit is a tube used as a passage for liquids, or in its broader sense an agent of communication etc. There is no antonym.
The definition of emissary is an agent sent on a mission to represent or advance the interests of another. I am unable to find an antonym.
A synonym for transform is change. An antonym for transform is preserve.
a synonym is change and antonym is non-change
in the context of organisation change and development, the antonym of scalability is: rigidity, inflexibility, the inability to change to meet changing circumstances within or from without the organisation
There is no antonym. Many words are non-opposable: for example animal, tree, man etc.
An agent of change is someone or some thing that facilitates change of some sort.
A change agent is an event, organisation, material thing or, more usually, a person that acts as a catalyst for change. In business terms, a change agent is a person chosen to bring about organisational change. Corporations often hire senior managers or even chief executives because of their aboility to effect change. Use in a sentence - Mr. Farnsworth is considered a change agent for his organization.
A sudden and random change of subject with no segue is a non sequitur.
A sentinel guards against enemies getting in, so an antonym might be a mole, meaning an enemy agent operating "underground."