Definitions

1. adverb

Used to introduce an explanation or justification of a previous statement.

“He asked me to explain where the money came from, and I began to tell him wherewith I had obtained it.”

2. preposition

With which or that which something is done.

“The company was founded wherewith the goal of reducing carbon emissions.”

3. noun

A thing with which something is done.

“The tools wherewith the engineer worked were very complex.”