to begin with
To begin with (phrase) means used to introduce the first point in a list of reasons or objections, often signalling that more will follow. Example: “To begin with, the figures don't add up.”
How to use to begin with
Learner’s notesIn plain EnglishEither "first of all" or "at the start".
Neutral, common in both speech and writing. As a list marker it often carries a faintly argumentative tone, hinting that further complaints are coming.
Which meaning applies depends on position: at the front of a sentence it usually means "firstly"; at the end it usually means "initially".
Fill the gap
Can you complete this real example?
_____, the figures don't add up.