The Originator, The Starter, The Beginner
The One who is the originator of all creation. The One who is the founder of creation.
The One who begins all things. The One who initiates all creation.
From the root b-d-' which has the following classical Arabic connotations:
to begin, create, make something new
to make something be first, have precedence
to contrive a new thing
to invent, to do first
to commence, start, at the beginning
Al-Mubdi has brought the cosmos into being without a prior model, Who created all the worlds in a perfect manner, Who initiates the giving to and the assistance of His servants, proving Himself as the best to rely on.
One who remembers the Attribute "al-Mubdi" ought to seek His forgiveness whenever he remembers it and to always stay attentive while supplicating to Him.