someone who can be employed as a detective to collect information and assist in criminal investigations | the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause |
a person secretly employed in espionage for a government | an active and efficient cause; capable of producing a certain effect |
| a businessman who buys or sells for another in exchange for a commission |
| a representative who acts on behalf of other persons or organizations |
| any agent or representative of a federal agency or bureau |
| a substance that exerts some force or effect |