to say the least
Not to exaggerate, as in When the ring turned up in the lost and found, she was delighted, to say the least. This idiom was first recorded in 1809.
Words nearby to say the least
to order,
to pieces,
to rights,
to save one's life,
to say nothing of,
to say the least,
to some degree,
to spare,
to speak of,
to start with,
to that effect