let alone

och ännu mindre, än mindre, lämna i fred

1. (idiomatic, negative polarity item) Much less; to say nothing of; used after one negative clause to introduce another, usually broader and more important clause, whose negation is implied by the negation of the first. However either of these instances mentioned can be applied with the use of let alone.

2. (transitive) To leave alone, let be; to stop bothering.