let alone

[let alone] {conj. phr.} 1. Even less; certainly not. - Used aftera negative clause.

I can't add two and two, let alone dofractions.

Jim can't drive a car, let alone a truck.

Compare:MUCH LESS, NOT TO MENTION. 2. [let alone] or [leave alone] {v.} Tostay away from; keep hands off; avoid.

When Joel gets mad, just lethim alone.

Little Patsy was warned to leave the birthday cakealone.

Compare: LET BE.