assign variable to value of Dictionary Javascript

I am building a dictionary but I would like some of the values to contain variables. is there a way to pass a variable to the dictionary so I can assign a dot notation variable? the variables object will always have the same structure and the dictionary will be static and structured the same for each key value pair. essentially I want to pass the value from the dictionary to another function to handle the data.

main.js

import myDictionary from "myDictionary.js"

const variables ={
item:"Hello"
}
const data = myDictionary[key](variables)
console.log(data)


myDictionary.js

const myDictionary = {
key: variables.item
}

so the log should display hello. I know it willl be something straightforward but cant seem to figure it out.

as always any help is greatly appreciated